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Achievements

Journal papers, international conference papers and awards. The lists can be searched by author, title and more.

ACHIEVEMENTS

All achievements

Journal papers

2026

  • Low-Loss and Incrementally Expandable Flat Modular OXC for Scalable Metro-Core Optical Networks
    A. Wada, T. Kuno, Y. Mori, and H. Hasegawa
    IEEE/Optica Journal of Optical Communications and Networking, 2026.
    Invited Paper
  • EEPN-Aware In-Service Estimation of Transmitter and Receiver Laser Linewidths Using Coherent Receiver DSP
    T. Sekizuka, T. Kuno, H. Hasegawa, and Y. Mori
    IEEE/Optica Journal of Lightwave Technology, Early Access, 2026.
    DOI10.1109/JLT.2026.3744691
  • Spectrum Narrowing Mitigation via Opto-Electrical Hybrid Partial-Response Spectrum Shaping and RNN-Based Sequence Estimation
    T. Sekizuka, T. Kuno, Y. Mori, and H. Hasegawa
    IEICE Transactions on Communications, vol. E109-B, no. 11, November 2026.
    DOI10.23919/transcom.2025OBI0002Invited Paper
  • Dynamic routing and wavelength assignment in optical networks: from capacity limits to flow-based control
    Y. Iida, S. Shimoi, H. Yuasa, T. Kuno, Y. Mori, and H. Hasegawa
    IEEE/Optica Journal of Optical Communications and Networking, vol. 18, no. 9, pp. D56-D67, September 2026.
    DOI10.1364/JOCN.592306

2025

  • DRAMA-PRO+: disaster recovery algorithm with mitigation awareness for protected translucent elastic optical networks
    R. Zou, S. -C. Lin, M. Matsuura, H. Hasegawa, G. Figueiredo, and S. Subramaniam
    IEEE/Optica Journal of Optical Communications and Networking, vol. 17, no. 9, pp. D18-D29, September 2025.
    DOI10.1364/JOCN.561155
  • Metropolitan Area Network Model Design Algorithm Using Regional Railways Information and Daily Movement Data for Beyond 5G Research
    K. Nakamura, S. Kitano, Y. Hirota, T. Tsuritani, H. Hasegawa, and T. Tachibana
    IEEE Access, vol. 13, pp. 82503-82513, 2025.
    DOI10.1109/ACCESS.2025.3568510
  • Deep-Depth Probability-Maintained Notch Enabling Nonlinear Distortion Measurement for Various Modulation Formats
    J. Li, T. Ye, X. Su, Y. Fan, K. Zhang, S. Shi, H. Nakashima, T. Hoshida, Z. Tao, Y. Mori, and H. Hasegawa
    IEEE/Optica Journal of Lightwave Technology, vol. 43, no. 10, 2025.
    DOI10.1109/JLT.2025.3540066
  • Three-Stage Optical Circuit Switch Architectures for Intra-Datacenter Networking
    T. Mitsuya, R. Higuchi, T. Kuno, T. Ochiai, H. Yuasa, Y. Mori, and H. Hasegawa
    IEEE/Optica Journal of Lightwave Technology, vol. 43, no. 2, pp. 400-407, January 2025.
    DOI10.1109/JLT.2024.3465208

2024

  • Optical networking that exploits massive wavelength/spectrum and spatial parallelisms
    H. Hasegawa
    IEEE/Optica Journal of Optical Communications and Networking, vol. 16, no. 11, pp. H27-H39, November 2024.
    DOI10.1364/JOCN.532594
  • Flexible waveband routing node architecture for spatial-division and multi-band optical networks
    H. Hasegawa
    IEEE/Optica Journal of Optical Communications and Networking, vol. 16, no. 7, pp. C20-C30, July 2024.
    DOI10.1364/JOCN.516234Invited Paper
  • Digital Coherent Receiver Enabling Nyquist Wavelength Demultiplexing Under Frequency Offset and Receiver-Side IQ Impairments
    T. Kuno, Y. Mori, and H. Hasegawa
    IEEE/Optica Journal of Lightwave Technology, vol. 42, no. 5, pp. 1409-1422, March 2024.
    DOI10.1109/JLT.2023.3327267
  • Demonstration of spectrum narrowing mitigation based on recurrent neural network for ultra-dense WDM networks
    R. Shiraki, Y. Mori, and H. Hasegawa
    Optica Optics Letters, vol. 49, no. 4, pp. 947-950, February 2024.
    DOI10.1364/OL.515414
  • Demodulation framework based on machine learning for unrepeated transmission systems
    R. Shiraki, Y. Mori, and H. Hasegawa
    IEICE Transactions on Communications, vol. E107-B, no. 1, January 2024.
    DOI10.1587/transcom.2023PNP0003

2023

  • Cost-effective network capacity upgrade by heterogeneous wavelength division multiplexing density with bandwidth-variable virtual direct links
    K. Hayashi, Y. Mori, and H. Hasegawa
    IEEE/Optica Journal of Optical Communications and Networking, vol. 15, no. 9, pp. D23-D32, September 2023.
    DOI10.1364/JOCN.485116
  • Architecture and performance evaluation of fiber-granularity routing networks with supplemental grooming by wavelength conversion
    T. Matsuo, R. Shiraki, Y. Mori, and H. Hasegawa
    IEEE/Optica Journal of Optical Communications and Networking, vol. 15, no. 8, pp. 541-552, August 2023.
    DOI10.1364/JOCN.486314

2022

  • RNN-Based Demodulation Framework for Spectrum Narrowing in Ultra-Dense WDM Networks
    R. Shiraki, Y. Mori and H. Hasegawa
    IEEE Photonics Technology Letters, vol. 34, issue. 18, pp. 993-996, September 2022.
    DOI10.1109/lpt.2022.3196866
  • Design and evaluation of a reconfigurable optical add-drop multiplexer with flexible wave-band routing in SDM networks
    T. Kuno, Y. Mori, S. Subramaniam, M. Jinno, and H. Hasegawa
    IEEE/Optica Journal of Optical Communications and Networking, vol. 14, No. 4, pp. 248-256, April 2022.
    DOI10.1364/JOCN.450504

2021

  • Design and control of highly spectrally efficient photonic networks enabled by fiber-granular routing on overlaid ring-shaped topologies
    R. Shiraki, Y. Mori, H. Hasegawa, K. Sato, and P. Monti
    IEEE/OSA Journal of Optical Communications and Networking, vol. 13, no. 11, pp. 233-243, November 2021.
    DOI10.1364/jocn.428571
  • High-port-count optical circuit switches for intra-datacenter networks
    Y. Mori and K. Sato
    IEEE/OSA Journal of Optical Communications and Networking, vol. 13, no. 8, pp. D43-D52, August 2021.
    DOI10.1364/jocn.425929Invited Paper
  • Pre-filtering techniques for spectrum narrowing caused by optical node traversal in ultra-dense WDM networks
    K. Okamura, Y. Mori, and H. Hasegawa
    IEEE Photonics Journal, vol. 13, no. 2, #7200513, April 2021.
    DOI10.1109/jphot.2021.3065139
  • Scalable and fast optical circuit switch based on colorless coherent detection: Design principle and experimental demonstration
    R. Matsumoto, T. Inoue, R. Konoike, H. Matsuura, K. Suzuki, Y. Mori, K. Ikeda, S. Namiki, and K. Sato
    IEEE/OSA Journal of Lightwave Technology, vol. 39, no. 8, pp. 2263-2274, April 2021.
    DOI10.1109/jlt.2021.3050734

2020

  • Assessment of optical node architectures for building next generation large bandwidth networks
    M. Ganbold, T. Yasuda, Y. Mori, H. Hasegawa, F. Inuzuka, A. Hirano, and K. Sato
    IEICE Transactions on Communications, vol. E103-B, no. 6, pp. 679-689, June 2020.
    DOI10.1587/transcom.2019ebp3148
  • Transmission-quality-aware online network design and provisioning enabled by optical performance monitoring
    K. Kayano, Y. Mori, H. Hasegawa, K. Sato, S. Oda, S. Yoshida, and T. Hoshida
    IEICE Transactions on Communications, vol. E103-B, no.6, pp.670-678, June 2020.
    DOI10.1587/transcom.2019ebp3155
  • Design of seamlessly and limitlessly expandable OXC and verification tests on its versatile applicability
    R. Hashimoto, Y. Mori, H. Hasegawa, and K. Sato
    IEEE/OSA Journal of Optical Communications and Networking, vol. 12, no. 5, pp. 99-108, March 2020.
    DOI10.1364/jocn.384140
  • Wavelength-division demultiplexing enhanced by silicon-photonic tunable filters in ultra-wideband optical-path networks
    Y. Mori, E. Honda, R. Shiraki, K. Suzuki, H. Matsuura, H. Kawashima, S. Namiki, K. Ikeda, and K. Sato
    IEEE/OSA Journal of Lightwave Technology, vol. 38, no. 5, pp. 1002-1009, March 2020.
    DOI10.1109/jlt.2019.2947709
  • Architecture and design of coarse/fine hybrid granular routing optical networks
    Y. Ito, Y. Mori, H. Hasegawa, and K. Sato
    IEICE Transactions on Communications, vol. E103.B, no.2, pp. 118-129, February 2020.
    DOI10.1587/transcom.2019ebp3026

2019

  • Improved optical amplification efficiency by using turbo cladding pumping scheme for multicore fiber optical networks
    H. Takeshita, K. Matsumoto, H. Hasegawa, K. Sato, and E. L. Taillandier de Gabory
    IEICE Transactions on Communications, vol. E102.B, no. 8, pp. 1579-1589, August 2019.
    DOI10.1587/transcom.2018ebp3296
  • Design and evaluation of quasi-Nyquist WDM networks utilizing widely deployed wavelength-selective switches
    R. Shiraki, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optics Express, vol. 27, issue 13, pp. 18549-18560, June 2019.
    DOI10.1364/oe.27.018549
  • Assessment of node- and link- level blocking and creating cost-effective networks in the era of large bandwidth services
    S. Yamakami, Y. Mori, H. Hasegawa, K. Sato, F. Inuzuka, A. Hirano
    IEICE TRANSACTIONS on Communications, vol. E102.B, no. 3, pp. 510-521, March 2019.
    DOI10.1587/transcom.2018ebp3140
  • Digital post-processing against inline spectrum narrowing caused by optical node traversals
    S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
    IEICE Communication Express, vol. 8, no. 4, pp. 93-98, January 2019.
    DOI10.1587/comex.2018xbl0162
  • Highly dense elastic optical networks enabled by grouped routing with distance-adaptive modulation
    K. Kayano, S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
    IEEE Photonics Technology Letters, vol. 31, issue 4, pp. 295-298, January 2019.
    DOI10.1109/lpt.2019.2892506
  • Design and evaluation of optical circuit switches for intra-datacenter networking
    Y. Mori, M. Ganbold, K. Sato
    IEEE/OSA Journal of Lightwave Technology, vol. 37, issue 2, pp. 330-337, January 2019.
    DOI10.1109/jlt.2019.2891209Invited Paper
  • Effectiveness of transmission-quality-aware online network design and provisioning enabled through optical performance monitoring
    K. Kayano, Y. Mori, H. Hasegawa, K. Sato, S. Oda, S. Yoshida, and T. Hoshida
    IEICE Communications Express, vol. 8, no. 4, pp. 81-86, January 2019.
    DOI10.1587/comex.2018xbl0157

2018

  • A large-scale optical circuit switch using fast wavelength-tunable and bandwidth-variable filters
    M. Ganbold, H. Nagai, Y. Mori, K. Suzuki, H. Matsuura, K. Tanizawa, K. Ikeda, S. Namiki, H. Kawashima, and K. Sato
    IEEE Photonics Technology Letters, vol. 30, issue. 16, pp. 1439-1442, August 2018.
    DOI10.1109/lpt.2018.2852328
  • Joint banding-node placement and resource allocation for multigranular elastic optical networks
    J. Wu, M. Xu, S. Subramaniam, and H. Hasegawa
    IEEE/OSA Journal of Optical Communications and Networking, vol.10, issue 8, August 2018.
    DOI10.1364/jocn.10.000c27
  • Design and verification of large-scale optical circuit switch using ULCF AWGs for datacenter application
    H. Nagai, Y. Mori, H. Hasegawa, and K. Sato
    OSA/IEEE Journal of Optical Communications and Networking, vol. 10, issue 7, pp. B82-B89, July 2018.
    DOI10.1364/jocn.10.000b82
  • First demonstration of subsystem-modular optical cross-connect using single-module 6 × 6 wavelength-selective switch
    R. Hashimoto, S. Yamaoka, Y. Mori, H. Hasegawa, K. Sato, K. Yamaguchi, K. Seno, and K. Suzuki
    IEEE/OSA Journal of Lightwave Technology, vol. 36, issue 7, pp. 1435-1442, April 2018.
    DOI10.1109/jlt.2018.2800082Invited Paper
  • Enhancing protection performance by effectively using spectral slots of impairment-aware elastic optical networks
    H. Takeshita, T. Oguma, S. Fujisawa, Y. Suzuki, B. Yatabe, A. Tajima, H. Hasegawa and K. Sato
    OSA/IEEE Journal of Optical Communications and Networking, vol. 10, issue 1, pp. A91-A101, January 2018.
    DOI10.1364/jocn.10.000a91

2017

  • Fast optical circuit switch for intra-datacenter networking
    K. Ueda, Y. Mori, H. Hasegawa, H. Matsuura, K. Ishii, H. Kuwatsuka, S. Namiki, T. Watanabe, and K. Sato
    IEICE Transactions on Communications E100-B, pp. 1740-1746, October 2017.
    DOI10.1587/transcom.2017obi0002Invited Paper
  • Spectral efficiency maximization of grouped routing optical networks with shared protection
    T. Ishikawa, Y. Mori, H. Hasegawa, and K. Sato
    OSA/IEEE Journal of Optical Communications and Networking 9, pp. 864-875, October 2017.
    DOI10.1364/jocn.9.000864
  • Large-scale optical node utilizing MxM WSSs optimally configured for traffic distribution
    M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
    IEEE Photonics Technology Letters 29, pp. 1293-1296, August 2017.
    DOI10.1109/lpt.2017.2707474
  • Highly reliable and large-scale subsystem-modular optical cross-connect
    S. Yamakami, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optics Express 25, pp. 17982-17994, July 2017.
    DOI10.1364/oe.25.017982
  • Compact OXC architecture, design and prototype development for flexible waveband routing optical networks
    T. Ishikawa, Y. Mori, H. Hasegawa, S. Subramaniam, K. Sato, and O. Moriwaki
    OSA Optics Express 25, pp. 15838-15853, July 2017.
    DOI10.1364/oe.25.015838
  • Dynamic path provisioning and disruption-free reoptimization algorithms for bandwidth on-demand services considering fairness
    M. Nakagawa, H. Hasegawa, and Ken-ichi Sato
    IEICE Transactions on Communications E100-B, pp. 536-547, April 2017.
    DOI10.1587/transcom.2016ebp3202
  • Algorithm for raising OXC port count to meet traffic growth at minimum cost
    K. Sato, Y. Mori, H. Hasegawa, and K. Sato
    OSA/IEEE Journal of Optical Communications and Networking 9, pp. A263-A270, Feb. 2017.
    DOI10.1364/JOCN.9.00A263Selected paper
  • Tipping point for the future scalable OXC: what size MxM WSS is needed?
    M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
    OSA/IEEE Journal of Optical Communications and Networking 9, pp. A18-A25, Feb. 2017. Selected paper
    DOI10.1364/JOCN.9.000A18
  • Large-scale optical switch utilizing multistage cyclic arrayed-waveguide gratings for intra-datacenter interconnection
    K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
    IEEE Photonics Journal 9, Article 7800412, Feb. 2017.
    DOI10.1109/jphot.2016.2635384

2016

  • Dynamic router performance control utilizing support vector machines for energy consumption reduction
    H. Kawase, Y. Mori, H. Hasegawa, and K. Sato
    IEEE Transactions on Network and Service Management 13, pp. 860-870, December 2016.
    DOI10.1109/tnsm.2016.2605640
  • Node architecture and design of flexible waveband routing optical networks
    H. Hasegawa, S. Subramaniam, and K. Sato
    IEEE/OSA Journal of Optical Communications and Networking, vol. 8, issue 10, October 2016.
    DOI10.1364/jocn.8.000734
  • Disruption-free expansion of protected optical path networks that utilize subsystem modular OXC nodes
    K. Sato, H. Hasegawa, and K. Sato
    IEEE/OSA Journal of Optical Communications and Networking, vol. 8, issue 7, July 2016.
    DOI10.1364/jocn.8.000476
  • Survivable grouped routing optical networks with dedicated path protection
    H. Hasegawa, Y. Mori, and K. Sato
    IEICE Transactions on Communications E99-B, pp.1435-1444, July 2016.
    DOI10.1587/transcom.2015ebp3482
  • Highly spectral efficient networks based on grouped optical path routing
    Y. Terada, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optics Express 24, pp. 6213-6228, March 2016.
    DOI10.1364/oe.24.006213
  • Large-scale and simple-configuration optical switch enabled by asymmetric-port-count subswitches
    K. Ueda, Y. Mori, H. Hasegawa, K. Sato, T. Watanabe
    IEEE Photonics Journal 8, Article 0601610, March 2016. Top-scoring paper
    DOI10.1109/jphot.2016.2529842
  • Novel optical-node architecture utilizing asymmetric-multiport wavelength-selective switches
    M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
    IEEE Photonics Journal 8, Article 0601210 March 2016. Top-scoring paper
    DOI10.1109/jphot.2016.2547838
  • Large-scale optical-switch prototypes utilizing cyclic arrayed-waveguide gratings for datacenters
    K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
    IEEE/OSA Journal of Lightwave Technology 34, pp. 608-617, January 2016. Top-scoring paper
    DOI10.1109/jlt.2015.2489221
  • Optimal nonuniform wavebanding in WDM mesh networks
    J. Wu, S. Subramaniam, and H. Hasegawa
    Springer Photonic Network Communications, vol. 31, pp. 376–385, November 2016.
    DOI10.1007/s11107-015-0583-2

2015

  • Differential reliability path accommodation design and reconfiguration in virtualized multi-layer transport network
    A. Kadohata, T. Tanaka, A. Watanabe, A. Hirano, H. Hasegawa, and K. Sato
    IEICE Transactions on Communications, vol. E98-B, issue 11, pp. 2151-2159, November 2015.
    DOI10.1587/transcom.e98.b.2151
  • Pre-adjustment rerouting for wavelength defragmentation in optical transparent WDM networks
    A. Kadohata, A. Watanabe, A. Hirano, H. Hasegawa, and K. Sato
    IEICE Transactions on Communications, vol. E98-B, issue 10, pp. 2014-2021, October 2015.
    DOI10.1587/transcom.e98.b.2014
  • Criteria for selecting subsystem configuration in creating large-scale OXCs
    Y. Tanaka, H. Hasegawa, and K. Sato
    IEEE/OSA Journal of Optical Communications and Networking, vol. 7, issue 10, pp. 1009-1017, October 2015.
    DOI10.1364/JOCN.7.001009
  • Performance analysis of large-scale OXC that enables dynamic modular growth
    Y. Tanaka, H. Hasegawa, and K. Sato
    OSA Optics Express, vol. 23, issue 25, pp. 5994-6006, February 2015.
    DOI10.1364/oe.23.005994
  • Experimental verification of highly scalable OXC that consists of subsystem-modular express-switch part and multicast-switch-based add/drop part enabling total throughput of 314 Tbps
    S. Takashina, H. Ishida, M. Niwa, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
    OSA Optics Express 23, pp. 14796-14805, May 2015.
    DOI10.1364/oe.23.014796
  • Hardware scale and performance evaluation of a compact subsystem modular optical cross connect that adopts tailored add/drop architecture
    H. Ishida, H. Hasegawa, and K. Sato
    IEEE/OSA Journal of Optical Communications and Networking, vol. 7, issue 6, pp. 586-595, June 2015.
    DOI10.1364/jocn.7.000586
  • Integrity enhancement of flexible/semi-flexible grid networks that minimizes disruption in spectrum defragmentation and bitrate-dependent blocking
    Z. Shen, H. Hasegawa, and K. Sato
    IEEE/OSA Journal of Optical Communications and Networking, vol. 7, issue 4, pp. 235-247, April 2015.
    DOI10.1364/jocn.7.000235
  • Wavelength-tunable filters utilizing arrayed waveguide gratings for colorless/directionless/contentionless optical signal drop in ROADMs
    S. Takashina, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
    IEEE Photonics Journal 7, article 7100511, February 2015.
    DOI10.1109/jphot.2015.2400397

2014

  • Performance evaluation of large-scale multi-stage hetero-granular optical cross-connects
    H.C-. Le, H. Hasegawa, and K. Sato
    OSA Optics Express, vol. 22, issue 3, pp. 3157-3168, February 2014.
    DOI10.1364/oe.22.003157
  • A novel elastic optical path network that utilizes bitrate-specific anchored frequency slot arrangement
    Z. Shen, H. Hasegawa, K. Sato, T. Tanaka, and A. Hirano
    OSA Optics Express, vol. 22, issue 3, pp. 3169-3179, February 2014.
    DOI10.1364/oe.22.003169
  • In-band estimation of optical signal-to-noise ratio from equalized signals in digital coherent receivers
    Md. S. Faruk, Y. Mori, and K. Kikuchi
    IEEE Photonics Journal 6, article 7800109, February 2014.
    DOI10.1109/jphot.2014.2304557
  • Large capacity optical networks applying multi-stage hetero-granular optical path routing
    H.C-. Le, H. Hasegawa, and K. Sato
    Elsevier Optical Switching and Networking, vol. 11, part A, pp. 105-112, January 2014.
    DOI10.1016/j.osn.2013.08.006

2013

  • Effectiveness of wavelength/waveband conversion and its allowable cost bound for hierarchical optical path networks
    Z. Shen, H. Hasegawa, and K. Sato
    IEEE/OSA Journal of Optical Communications and Networking, vol. 5, issue 11, pp. 1262-1274, November 2013.
    DOI10.1364/jocn.5.001262
  • A large-scale wavelength routing optical switch for data center networks
    K. Sato, H. Hasegawa, T. Niwa, and T. Watanabe
    IEEE Communications Magazine, vol. 51, issue 9, pp. 46-52 September 2013.
    DOI10.1109/mcom.2013.6588649
  • An efficient heuristic waveband assignment algorithm for hierarchical optical path networks utilizing wavelength convertors
    Z. Shen, H. Hasegawa, and K. Sato
    Elsevier Optical Switching and Networking,” vol. 10, issue 1, pp. 54-61, January 2013.
    DOI10.1016/j.osn.2012.07.003
  • PCE-based fast path control in multi-domain photonic networks
    Y. Iizawa, S. Araki, S. Ishida, I. Nishioka, K. Shimada, H. Hasegawa, and K. Sato
    Elsevier Optical Switching and Networking, vol. 10, issue 1, pp. 32-43, January 2013.
    DOI10.1016/j.osn.2012.07.004
  • Coarse granular optical routing networks utilizing fine granular add/drop
    Y. Taniguchi, H. Hasegawa, and K. Sato
    IEEE/OSA Journal of Optical Communications and Networking, vol. 5, issue 7, pp. 774-783, July 2013.
    DOI10.1364/jocn.5.000774
  • Performance evaluation of large capacity ultra-compact waveband cross-connect
    T. Ban, K. Ishii, H. Hasegawa, K. Sato, H. Takahashi, and M. Okuno
    IEEE Photonic Technology Letters, vol. 25, issue 5, pp. 446-449, March 2013.
    DOI10.1109/lpt.2013.2238668
  • Efficient shared protection network design algorithm that iterates path relocation with new resource utilization metrics
    M. Sato, H. Hasegawa, and K. Sato
    IEICE Transactions on Communications, vol. E96-B, issue 4, pp. 956-966, April 2013.
    DOI10.1587/transcom.e96.b.956
  • A large-scale photonic node architecture that utilizes interconnected OXC subsystems
    Y. Iwai, H. Hasegawa, and K. Sato
    OSA Optics Express, vol. 21, no. 1, pp. 478-487, January 2013.
    DOI10.1364/oe.21.000478
  • A novel large-scale OXC architecture and an experimental system that utilizes wavelength path switching and BER selection
    T. Ban, H. Hasegawa, K. Sato, T. Watanabe, and H. Takahashi
    OSA Optics Express, vol. 21, issue 1, pp. 469-477, January 2013.
    DOI10.1364/oe.21.000469

2012

  • Virtual fiber networking and impact of optical path grooming on creating efficient layer one services
    F. Naruse, H. Hasegawa, and K. Sato
    IEICE Trans. Commun., Vol.E95-B, No.03, pp. 723-729, March 2012.
  • Optical node architecture that utilize dedicated add/drop switches to realize colorless, directionless and contentionless capability
    Y. Yamada, H. Hasegawa, and K. Sato
    IEICE Trans. Commun., vol. E95-B, No. 4, April 2012, pp. 1307-1316.
  • Effects of optical layer protection granularity in survivable hierarchical optical path network
    Y. Yamada, H. Hasegawa, and K. Sato
    IEICE Trans. on Communications, vol. E95-B, No.9, September 2012, pp.2959-2963.
  • Evaluations of different optical path add/drop ratio restriction schemes on OXC hardware scale and network resource requirement
    F. Naruse, Y. Yamada, H. Hasegawa, and K. Sato
    IEEE/OSA Journal of Optical Communications and Networking (JOCN), vol. 4, No. 11, pp. B26–B34, November, 2012.
  • Optical fast circuit switching networks employing dynamic waveband tunnel
    T. Ogawa, H. Hasegawa, K. Sato
    IEICE,vol. E95-B, No. 10, October 2012, pp. 3139-3148.
  • Router power saving employing dynamic performance control based on traffic predictions
    H. Ito, H. Hasegawa, and K. Sato
    IEICE Trans. Commun., Vol. E95-B, No. 10, pp. 3130-3138, October 2012.
  • Novel wavelength tunable filter applying multi-stage selection for colorless, directionless, and contentionless ROADMs
    T. Niwa, H. Hasegawa, and K. Sato
    IEICE Electronics Express, vol. 9, No. 16, August 2012, pp. 1297-1303.
  • A large port count wavelength routing optical switch that consists of cascaded small-size cyclic Arrayed Waveguide Gratings
    T. Niwa, H. Hasegawa, K. Sato, T. Watanabe, and H. Takahashi
    IEEE Photonics Technology Letters, vol. 24, Issue 22, pp. 2027-2030, November 2012.
  • Impact of elastic optical paths that adopt distance adaptive modulation to create efficient networks
    T. Takagi, H. Hasegawa, K. Sato, Y. Sone, A. Hirano, and Masahiko Jinno
    IEICE, vol. E95-B, No.12, pp. 3793-3801, December 2012.

2011

  • Compactmatrix-switch-based hierarchical optical path cross-connect with colorless waveband add/drop ratio restriction
    R. Hirako, H. Hasegawa, K. Sato, and M. Okuno, and O. Moriwaki
    IEICE Special Issue on Photonic Network Technologies in Terabit Network Era, 2011, IEICE Trans. Commun., Vol. E94-B, No. 4, April 2011, pp. 918-927.
  • Hybrid hierarchical optical path network design algorithms utilizing ILP optimization
    L. H. Chau, H. Hasegawa, and K. Sato
    Elsevier, Optical Switching and Networking, Special Issue, vol. 8, 2011, pp. 226-234.
  • A dynamic and quasi-centralized RWA method for optical fast circuit switching networks employing route pre-prioritization
    H. Ohno, H. Hasegawa, and K. Sato
    Elsevier, Optical Switching and Networking, Special Issue, vol. 8, No. 4, December 2011, pp. 242-248.
  • Development of hierarchical optical path cross-connect systems employing wavelength/waveband selective switches
    K. Ishii, S. Mitui, H. Hasegawa, K. Sato, S. Kamei, M. Okuno, and H. Takahashi
    IEEE/OSA Journal of Optical Communications and Networking, Vol. 3, Issue 7, pp. 559-567, July 2011.
  • Impact of electrical grooming and regeneration of wavelength paths in creating hierarchical optical path networks
    L. H. Chau, H. Hasegawa and K. Sato
    OSA, Optics Express, vol. 19, No. 26, December 2011, B882-B894.
  • Development of Terabit-scale compact hierarchical optical cross-connect system using planar device integration
    O. Moriwaki, K. Noguchi, H. Takahashi, T. Sakamoto, K. Sato, H. Hasegawa, M. Okuno, and Y. Ohmori
    IEEE Journal of Lightwave Technology, vol. 29, No. 4, February 2011, pp. 449-455.

2010

  • Wavelength assignment for concatenated ROADM ring networks and switch scale reduction in concatenating node
    K. Ishii, H. Hasegawa, and K. Sato
    J. OPT. COMMUN. NETW., vol. 1, no. 1, January 2010, pp. 67-79.
  • Development of hierarchical optical cross-connect system for ROADM-ring connection using PLC technologies
    K. Ishii, O. Moriwaki, H. Hasegawa, and K. Sato, Y. Jinnouchi, M. Okuno, and H. Takahashi
    Photonics Technology Letters, IEEE Volume: 22, No. 7, pp. 489-500, 2010.
  • Ultra-compact waveband cross-connect module using waveband selective switches: development and performance verification
    K. Ishii, H. Hasegawa, K. Sato, M. Okuno, and H. Takahashi
    Photonics Technology Letters, IEEE Vol. 22, No. 23, pp. 1741-1743, 2010.
  • 持続的発展可能な情報通信ネットワークと光ネットワーク技術の役割
    佐藤
    電子情報通信学会誌，グリーンICTに向けた光ネットワーク技術小特集，vol. 93, No. 8, pp. 654-658, 2010年8月．
  • Multi-hop signal transmission experiments employing PLC-based hierarchical optical cross-connect system
    O. Moriwaki, K. Noguchi, H. Takahashi, T. Sakamoto, K. Sato, H. Hasegawa, M. Okuno, and Y. Ohmoroi
    IEEE Photonic Technology Letters, vol. 22, No. 21, November 2010, pp. 1586-1588.
  • Hierarchical Optical Path Network Design Algorithm Considering Waveband Add/Drop Ratio Constraint
    L. H. Chau, H. Hasegawa, K. Sato
    IEEE/OSA Journal of Optical Communications and Networking, JOCN, vol. 2, No. 10, October 2010, pp. 872-882.

2009

  • Hierarchical optical path network design algorithm considering waveband protection
    Y. Yamada, H. Hasegawa, and K. Sato
    Journal ofLightwave Technology, vol. 27, No. 24, Dec. 2009, pp. 5736-5748.
  • Analysis and development of fixed and variable waveband MUX/DEMUX utilizing AWG routing functions
    S. Kakehashi, H. Hasegawa, K. Sato, O. Moriwaki, and S. Kamei
    IEEE JLT, vol. 27, No. 1, January 2009, pp. 30-40.
  • Optical networking technologies that will create future bandwidth abundant networks
    K. Sato and H. Hasegawa
    Journal of Optical Communications and Networking, Special Issue on Optical Networks for Future Internet, vol. 1, No. 2, July 2009, pp. A81-A93.

2008

  • An Edge-Preserving Super-Precision for Simultaneous Enhancement of Spacial and Grayscale Resolutions
    H. Hasegawa, T.Ohtsuka, I. Yamada, and K. Sakaniwa
    vol. E91-A, No.2, pp.-, Feb. 2008.
  • Quasi-Dynamic Network Design Considering Different Service Contract Terms
    K. Kanie, H. Hasegawa, and K. Sato
    IEEE J-SAC, OCN, vol. 26, No. 3, April 2008, pp 47-53.
  • Optical cross-connect switch architectures for hierarchical optical path networks
    S. Kakehashi, H. Hasegawa, K. Sato, O. Moriwaki, and S. Kamei
    IEICE Trans. Commun., vol. E91-B, No. 10, October 2008, pp. 3174-3184.
  • An efficient hierarchical optical path network design algorithm based on traffic demand expression in a Cartesian produce space
    I. Yagyuu, H. Hasegawa, and K. Sato
    IEEE Journal of Selected Areas in Communications (J-SAC), Supplement on Optical Communications and Networking (OCN), vol. 26, No. 6, August 2008, pp. 22-31.

2007

  • Recent developments in and challenges of photonic networking technologies
    K. Sato
    IEICE Trans. Commun., vol. E90-B, No. 3, March 2007, pp. 454-467.
  • 光ネットワーク技術の進展
    佐藤
    電子情報通信学通信ソサイエティマガジン, No. 1, 夏号、2007 年 6月、pp. 76-88.
  • Prospects and challenges of multi-layer optical networks
    K. Sato and H. Hasegawa
    IEICE Trans. Commun., Vol. E90-B, No. 8, pp. 1890-1902, 2007.
  • Loop-back AWG Router with Non-uniform Transmission Capacity
    O. Moriwaki, K. Suzuki, H. Takahashi, Y. Sakai , K. Sato, and S. Kakehashi
    IEEE Photonic Technology Letters, vol. 19, No. 17, September 2007, pp. 1319-1321.
  • Performance of Waveband MUX/DEMUX Using Concatenated AWGs
    S. Kakehashi, H. Hasegawa, K. Sato, O. Moriwaki, S. Kamei, Y. Jinnouchi, and M. Okuno
    IEEE Photonic Technology Letters, vol. 19, No. 16, August 2007, pp. 1197-1199.
  • Formulation of waveguide connection for waveband MUX/DEMUX using concatenated Arrayed-Waveguide Gratings
    S. Kakehashi, H. Hasegawa, K. Sato and O. Moriwaki
    IEICE Trans. Commun. Letter, vol. E90-B, No. 10, October 2007, pp. 2950-2952.

International conferences

2026

  • Split-Sideband Digital Subcarrier Multiplexing for IQ-Impairment Compensation without Inter-Subcarrier MIMO
    T. Kuno, T. Sekizuka, Y. Mori, and H. Hasegawa
    European Conference on Optical Communication, paper We4-P54, Málaga, Spain, September 2026.
  • Network-Wide Deployment of Pluggable Transceivers with Selective Wavelength Routing and Path-Splitting Regeneration
    S. Shimoi, T. Sekizuka, T. Kuno, Y. Mori, K. Hosokawa, S. Yanagimachi, and H. Hasegawa
    European Conference on Optical Communication, paper We3-A5, Málaga, Spain, September 2026.
  • Network-Level Impact of EDFA Gain Fluctuations under Dynamic RWA in High-Symbol-Rate WDM Networks
    T. Sekizuka, S. Shimoi, T. Kuno, H. Hasegawa, and Y. Mori
    European Conference on Optical Communication, paper We3-A4, Málaga, Spain, September 2026.
  • Hybrid FXC-WXC Networks with Selective Wavelength Conversion: Dynamic Path Control and Experimental Demonstration
    R. Hosokawa, S. Shimoi, T. Sekizuka, K. Mano, T. Kuno, Y. Mori, K. Hosokawa, S. Yanagimachi, and H. Hasegawa
    European Conference on Optical Communication, paper Mo5-H4, Málaga, Spain, September 2026.
  • Scalable Electro-Optical Hybrid Switching Networks with Modular EXCs and FXCs
    Y. Iida, S. Shimoi, T. Kuno, Y. Mori, K. Hosokawa, S. Yanagimachi, and H. Hasegawa
    International Conference on Photonics in Switching and Computing, paper WeP1-B3.5, Valencia, Spain, September 2026.
  • Scalable Layered Optical Networks with Fixed-Size Modular OXCs
    I. Makino, S. Shimoi, T. Kuno, Y. Mori, K. Hosokawa, S. Yanagimachi, and H. Hasegawa
    International Conference on Photonics in Switching and Computing, paper WeP1-B3.4, Valencia, Spain, September 2026.
  • Hybrid FXC-WXC Network Architecture Design for Large-Scale Optical Networks
    R. Hosokawa, S. Shimoi, T. Kuno, Y. Mori, K. Hosokawa, S. Yanagimachi, and H. Hasegawa
    International Conference on Photonics in Switching and Computing, paper WeP1-B3.3, Valencia, Spain, September 2026.
  • Joint Subcarrier Demultiplexing and Receiver-Side IQ-Impairment Compensation under Frequency Offset
    J. Nishi, T. Sekizuka, T. Kuno, Y. Mori, and H. Hasegawa
    International Conference on Photonics in Switching and Computing, paper WeP1-A2.2, Valencia, Spain, September 2026.
  • Hybrid In-Link and Path Protection in Optical Networks with High Link Parallelism
    H. Matsunaga, Y. Iida, S. Shimoi, H. Yuasa, T. Kuno, and H. Hasegawa
    International Conference on Photonics in Switching and Computing, paper TuP1-A1.3, Valencia, Spain, September 2026.
  • Virtualization of Wavelength Switching Function in Mixed Granularity Routing Optical Networks
    H. Hasegawa
    International Conference on Photonics in Switching and Computing, paper TuP1-A1.1, Valencia, Spain, September 2026.
    Invited Paper
  • In-Service Laser Anomaly Detection via DSP-Enabled Optical Performance Monitoring
    T. Sekizuka, K. Mano, T. Kuno, H. Hasegawa, and Y. Mori
    Optica Optical Fiber Communication Conference, paper Th1I.1, Los Angeles, USA, March 2026.
    DOI10.1364/OFC.2026.Th1I.1
  • Survivable Hybrid FXC-WXC Architecture for Cost-Effective Core/Regional Optical Networks
    S. Shimoi, H. Yuasa, T. Sekizuka, T. Kuno, Y. Mori, W. Maeda, S. Yanagimachi, and H. Hasegawa
    Optica Optical Fiber Communication Conference, paper W3A.5, Los Angeles, USA, March 2026.
    DOI10.1364/OFC.2026.W3A.5
  • Low-Loss and Infinitely Scalable Flat Modular OXC for Metro-Scale Optical Networks
    A. Wada, T. Kuno, Y. Mori, and H. Hasegawa
    Optica Optical Fiber Communication Conference, paper W3A.6, Los Angeles, USA, March 2026.
    DOI10.1364/OFC.2026.W3A.6
  • A 4,096×4,096 Strictly Non-Blocking Optical Circuit Switch Delivering 819.2 Tb/s via Space-and-Wavelength Routing
    K. Mano, T. Sekizuka, T. Kuno, H. Hasegawa, and Y. Mori
    Optica Optical Fiber Communication Conference, paper M3F.3, Los Angeles, USA, March 2026.
    DOI10.1364/OFC.2026.M3F.3
  • Logical Topology Adaptation in DCI/DCX-Embedded Multi-Granularity Routing Layered Optical Networks
    H. Yuasa, T. Kuno, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, W. Maeda, S. Yanagimachi, and H. Hasegawa
    Optica Optical Fiber Communication Conference, paper M1A.1, Los Angeles, USA, March 2026.
    DOI10.1364/OFC.2026.M1A.1
  • GNN-Based Bounded Maximum Flow Approximation for Routing and Wavelength Assignment in Dynamic Optical Networks
    Y. Iida, S. Shimoi, H. Yuasa, T. Kuno, Y. Mori, and H. Hasegawa
    SPIE Photonics West, paper 13905-6, San Francisco, USA, January 2026.
    DOI10.1117/12.3080251
  • High-Port-Count Optical Circuit Switch Architecture Enabling IM/DD Transmission through Static Chromatic Dispersion Compensation
    K. Mano, T. Sekizuka, T. Kuno, Y. Mori, and H. Hasegawa
    SPIE Photonics West, paper 13905-7, San Francisco, USA, January 2026.
    DOI10.1117/12.3080417

2025

  • Layered Multiband Network Architecture with Spatially Parallel Bypass for Selective and Cost-Efficient SDM Deployment
    H. Yuasa, T. Kuno, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, W. Maeda, S. Yanagimachi, and H. Hasegawa
    European Conference on Optical Communication (ECOC), paper Tu.04.06.1, Copenhagen, Denmark, September/October 2025.
    DOI10.1109/ECOC66593.2025.11263139
  • A Hybrid FXC-WXC Network Architecture with Low-Cost Pluggable Transceivers for Metro-Scale Optical Networks
    S. Shimoi, H. Yuasa, T. Sekizuka, T. Kuno, Y. Mori, W. Maeda, S. Yanagimachi, and H. Hasegawa
    European Conference on Optical Communication (ECOC), paper Tu.01.06.3, Copenhagen, Denmark, September/October 2025.
    DOI10.1109/ECOC66593.2025.11263435
  • Multi-Granularity-Routing Layered Optical Networks That Enable Flexible Optical Bypass
    H. Hasegawa
    Optica Advanced Photonics Congress, paper NeW4B.1, Marseille, France, July 2025.
    DOI10.1364/NETWORKS.2025.NeW4B.1Invited Paper
  • Spectrum Narrowing Mitigation via Optoelectrical Partial-Response Spectrum Shaping
    T. Sekizuka, R. Higuchi, K. Satake, T. Kuno, Y. Mori, and H. Hasegawa
    OptoElectronics and Communications Conference / International Conference on Photonics in Switching and Computing (OECC/PSC), paper ThB1-2, Sapporo, Japan, June/July 2025.
    DOI10.23919/OECC/PSC62146.2025.11109386Best Paper Award
  • Mixed Path-Granularity and Grouped-Path Routing Networks
    Y. Hirai, T. Kuno, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
    OptoElectronics and Communications Conference / International Conference on Photonics in Switching and Computing (OECC/PSC), paper TuF2-3, Sapporo, Japan, June/July 2025.DOI:
    DOI10.23919/OECC/PSC62146.2025.11109615
  • Demonstration of Multigranular-Routing Layered Network with Impairment-Aware Modulation Format Selection
    H. Yuasa, T. Kuno, T. Sekizuka, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, W. Maeda, S. Yanagimachi, and H. Hasegawa
    Optica Optical Fiber Communication Conference, paper Tu2H.2, San Francisco, USA, March 2025.
    DOI10.1364/OFC.2025.Tu2H.2
  • Analytical and Numerical Hybrid Capacity Estimation Method for Multi-band Elastic Optical Networks
    S. Shimoi, H. Yuasa, T. Kuno, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
    SPIE Photonics West, paper 13374-10, San Francisco, USA, January 2025.
    DOI10.1117/12.3043304
  • EEPN Mitigation by Local Oscillator Phase Isolation with Dual Pilot Carriers
    T. Sekizuka, T. Kuno, R. Higuchi, R. Shiraki, Y. Mori, and H. Hasegawa
    SPIE Photonics West, paper 13374-18, San Francisco, USA, January 2025.
    DOI10.1117/12.3040642
  • Infinitely Scalable Modular OXC Node Architecture with Sparse and Regular Intra-Node Inter-Connection
    A. Wada, T. Kuno, Y. Mori, W. Maeda, S. Yanagimachi, and H. Hasegawa
    SPIE Photonics West, paper 13374-25, San Francisco, USA, January 2025.
    DOI10.1117/12.3044158

2024

  • Laser-frequency Transition Measurement Using Coherent Receivers with Coded Local Oscillators
    K. Kagawa, T. Kuno, R. Higuchi, Y. Mori, and H. Hasegawa
    IEEE Photonics Conference, paper MD1.2, Rome, Italy, November 2024.
    DOI10.1109/ipc60965.2024.10799719
  • Robustness of Adaptive Symbol Decision against Transmitter Impairments on GS-QAM Signals
    T. Sekizuka, T. Kuno, R. Higuchi, Y. Mori, and H. Hasegawa
    IEEE Photonics Conference, paper TuF3.3, Rome, Italy, November 2024.
    DOI10.1109/ipc60965.2024.10799689
  • 11,520×11,520 Optical Circuit Switch for Intra- and Inter-datacenter Converged Networks
    T. Kuno, Y. Mori, and H. Hasegawa
    IEEE Photonics Conference, paper MD2.2, Rome, Italy, November 2024.
    DOI10.1109/ipc60965.2024.10799666
  • Cost-Effective Network-Facility Upgrade Scheme Enabling Incremental Transition to Multiband Optical Networks
    H. Yuasa, Y. Mori, and H. Hasegawa
    European Conference on Optical Communication, paper W2A.91, Frankfurt, Germany, September 2024.
  • Demonstration of 12,288 × 12,288 Optical Circuit Switch with 17.2 Pbps Throughput for Intra-datacentre Networks
    T. Kuno, Y. Mori, and H. Hasegawa
    European Conference on Optical Communication, paper W2A.125, Frankfurt, Germany, September 2024.
  • Demonstration of Low-complexity Digital Coherent Receivers for Intra-datacenter Networks
    T. Kuno, T. Mitsuya, Y. Mori, and H. Hasegawa
    IEEE Summer Topicals Meeting Series Co-Located with Photonics in Switching and Computing, paper TuA2.4, Bridgetown, Barbados, July 2024.
    DOI10.1109/sum60964.2024.10614568
  • Experimental Demonstration of NN-based Symbol Decision to Mitigate Transmitter Impairments
    T. Sekizuka, T. Kuno, R. Higuchi, T. Ochiai, Y. Mori, and H. Hasegawa
    Opto-Electronics and Communications Conference, paper MoB1-4, Melbourne, Australia, June 2024.
  • Multi-Layered Optical Network Architecture with Coarse-Granularity-Routing Optical Bypass
    H. Yuasa, K. Cruzado, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, K. Hosokawa, S. Yanagimachi, and H. Hasegawa
    International Conference on Optical Network Design and Modeling, Madrid, Spain, 2024.
  • Capacity-bound evaluation and routing and spectrum assignment for elastic optical path networks with distance-adaptive modulation
    K. Cruzado, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
    Optica Optical Fiber Communication Conference, paper W3C.6, San Diego, USA, March 2024.
    DOI10.1364/OFC.2024.W3C.6
  • Cost-effective capacity enhancement of survivable optical networks by supplemental band expansion and backup resource sharing
    D. Saito, Y. Mori, K. Hosokawa, S. Yanagimachi, and H. Hasegawa
    Optica Optical Fiber Communication Conference, paper W1C.2, San Diego, USA, March 2024.
    DOI10.1364/OFC.2024.W1C.2
  • Intra-datacenter optical circuit switch architecture with multi-band transmission technologies
    T. Kuno, R. Higuchi, K. Satake, H. Yuasa, Y. Mori, and H. Hasegawa
    Optica Optical Fiber Communication Conference, paper M2G.3, San Diego, USA, March 2024.
    DOI10.1364/OFC.2024.M2G.3
  • Robustness of digital subcarrier multiplexing systems to laser phase noise and chromatic dispersion
    K. Satake, R. Shiraki, Y. Mori, H. Hasegawa
    SPIE Photonics West, paper 12894-4, San Francisco, USA, January 2024.
    DOI10.1117/12.3002195Best Student Paper Award

2023

  • Flexible-Granularity Switching Node Architecture for Spatial-Division and Multi-Band Optical Networks
    H. Hasegawa
    European Conference on Optical Communication, paper We.C.5.1, Glasgow, United Kingdom, October 2023.
    DOI10.1049/icp.2023.2108Invited Paper
  • Wavelength division demultiplexing of Nyquist WDM signals under frequency offset and receiver-side IQ impairments
    T. Kuno, Y. Mori, and H. Hasegawa
    European Conference on Optical Communication, paper We.A.7.4, Glasgow, United Kingdom, October 2023.
    DOI10.1049/icp.2023.2583
  • Experimental demonstration of 128×128 optical cross-connects with 2.45 Pbps throughput
    T. Ochiai, T. Kuno, R. Munakata, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
    European Conference on Optical Communication, paper Th.B.6.4, Glasgow, United Kingdom, October 2023.
    DOI10.1049/icp.2023.2536
  • Transceiver-impairment mitigation enabled by adaptive symbol decision with neural networks
    T. Ochiai, R. Higuchi, T. Kuno, R. Shiraki, Y. Mori, and H. Hasegawa
    Photonics in Switching and Computing, paper Fr2B.2, Mantova, Italy, September 2023.
    DOI10.1109/PSC57974.2023.10297285
  • 4.71-Pbps-throughput multiband OXC based on space- and wavelength-granular hybrid switching
    T. Kuno, T. Ochiai, R. Higuchi, K. Satake, K. Cruzado, R. Munakata, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
    Photonics in Switching and Computing, paper Th2A.2, Mantova, Italy, September 2023.
    DOI10.1109/PSC57974.2023.10297168Best Student Paper Award
  • Effective capacity estimation based on cut-set load analysis in optical path networks
    K. Cruzado, Y. Mori, S.-C. Lin, M. Matsuura, S. Subramaniam, H. Hasegawa
    Photonics in Switching and Computing, paper Th4A.2, Mantova, Italy, September 2023.
    DOI10.1109/PSC57974.2023.10297165
  • Optical switch architecture for intra-datacenter networks
    Y. Mori and H. Hasegawa
    Optica Advanced Photonics Congress, paper SpTu1E.1, Busan, Korea, July 2023.
    DOI10.1364/SPPCOM.2023.SpTu1E.1Invited Paper
  • Adaptive joint pre-/post-equalization of spectrum narrowing caused by cascaded photonic nodes
    Y. Ishikawa, R. Shiraki, Y. Mori, and H. Hasegawa
    Optica Advanced Photonics Congress, paper NeTu3B.3, Busan, Korea, July 2023.
    DOI10.1364/NETWORKS.2023.NeTu3B.3Student Paper Award
  • Low-cost coherent transceivers with quantization noise mitigation function enabled by neural networks
    T. Ochiai, R. Shiraki, Y. Mori, and H. Hasegawa
    Optica Advanced Photonics Congress, paper JW2E.1, Busan, Korea, July 2023.
    DOI10.1364/IPRSN.2023.JW2E.1Student Paper Award
  • Modulation and demodulation method robust against laser phase noise
    R. Higuchi, T. Kuno, R. Shiraki, Y. Mori, and H. Hasegawa
    Conference on Lasers and Electro-Optics/Europe – European Quantum Electronics, paper CI-6.4, Munich, Germany, June 2023.
    DOI10.1109/CLEO/Europe-EQEC57999.2023.10232126
  • Architecture and performance evaluation of bundled-path-routing multi-band optical networks
    R. Munakata, T. Kuno, Y. Mori, S. C. Lin, M. Matsuura, S. Subramaniam, and H. Hasegawa
    Optica Optical Fiber Communication Conference, paper M4G.8, San Diego, USA, March 2023.
    DOI10.1364/OFC.2023.M4G.8
  • Cost-effective network capacity enhancement with multi-band virtual bypass links
    D. Saito, Y. Mori, K. Hosokawa, S. Yanagimachi, and H. Hasegawa
    Optica Optical Fiber Communication Conference, paper M4G.4, San Diego, USA, March 2023.
    DOI10.1364/OFC.2023.M4G.4
  • Optical path management based on machine learning for optical networks
    R. Shiraki, Y. Mori, and H. Hasegawa
    Proc. SPIE 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII, 124290M, March 2023.
    DOI10.1117/12.2649581Invited Paper

2022

  • Spatially-Jointed Flexible Waveband Routing Optical Networks Adopting Shared Path Protection
    R. Munakata, Y. Mori, S. Subramaniam, M. Jinno, and H. Hasegawa
    12th International Workshop on Reliable Networks Design and Modeling, paper 1-7, Compiegne, France, September, 2022.
    DOI10.1109/rndm55901.2022.9927712
  • Reinforcement-Learning-based Network Design and Control with Stepwise Reward Variation and Link-Adjacency Embedding
    K. Cruzado, R. Shiraki, Y.Mori, T. Tanaka, K. Higashimori, F. Inuzuka, T. Ohara, and H. Hasegawa
    European Conference on Optical Communications, paper We2B.3, Basel, Switzerland, September 2022.
  • Highly Reliable and Large-Scale Optical Switch for Intra-Datacentre Networks
    T. Mitusya, T. Ochiai, T. Kuno, Y. Mori, H. Hasegawa and K. Sato
    European Conference on Optical Communications, paper We5.49, Basel, Switzerland, September 2022.
  • Constellation-Shaped 64QAM Robust against Phase Noise in Intra-Datacenter Networks
    J. Sakano, R. Shiraki, Y. Mori, and H. Hasegawa
    Opto-Electronics and Communications Conference/International Conference on Photonics in Switching and Computing, paper WF3-4, Toyama, Japan, July 2022.
    DOI10.23919/OECC/PSC53152.2022.9850095
  • Optical Performance Monitoring Using Adaptive FIR Filters for Constellation-Shaped Higher-Order QAM Signals
    N. Tsuchida, T. Kuno, J. Sakano, Y. Mori, and H. Hasegawa
    Opto-Electronics and Communications Conference/International Conference on Photonics in Switching and Computing, paper ME1-5, Toyama, Japan, July 2022.
    DOI10.23919/oecc/psc53152.2022.9849979
  • Demonstration of High-Throughput Intra-Datacenter Switches Using Interleaved AWGs for Nyquist WDM
    T. Kuno, T. Mitsuya, Y. Mori, and H. Hasegawa, and K. Sato
    Optica 2022 Optical Fiber Communication Conference and Exposition, San Diego, USA, paper Th3A.2, March, 2022.
    DOI10.1364/ofc.2022.th3a.2
  • Design and Dynamic Control of Fiber-Granular Routing Networks with Next-Generation Optical Paths
    T. Matsuo, R. Shiraki, Y. Mori, and H. Hasegawa
    Optica 2022 Optical Fiber Communication Conference and Exposition, San Diego, USA, paper W3F.6, March, 2022.
    DOI10.1364/ofc.2022.w3f.6
  • Measurement Method of Transmitter IQ Imbalance in Digital Coherent Communication Systems
    N. Tsuchida, T. Kuno, Y. Mori, and H. Hasegawa
    Society of Photo-Optical Instrumentation Engineers OPTO, paper 12027-12, San Francisco, USA, February 2022.
    DOI10.1117/12.2609376

2021

  • Dynamic Routing and Spectrum Allocation Based on Actorcritic Learning for Multi-fiber Elastic Optical Networks
    Y. Wang, Y. Mori, and H. Hasegawa
    OSA Photonics Switching and Computing, paper W1B.3, Optica Virtual Event, September 2021.
    DOI10.1364/psc.2021.w1b.3
  • Joint Modulation/Demodulation Optimization without the Differentiable Channel Model in the Presence of Phase Noise
    J. Sakano, Y. Mori, and H. Hasegawa
    OSA Photonics Switching and Computing, paper Tu5A.6, Optica Virtual Event, September 2021.
    DOI10.1364/psc.2021.tu5a.6
  • Design and Performance Evaluation of Resilient Optical Path Networks That Adopt Spatially-Jointed Flexible Waveband Routing
    R. Munakata, Y. Mori, S. Subramaniam, M. Jinno, and H. Hasegawa
    International Conference on Optical Network Design and Modeling, paper NPR.1, Gothenburg, Sweden, July 2021.
    DOI10.23919/ondm51796.2021.9492351
  • Measurement of Transmitter IQ Skew in High-Speed Digital Coherent Communication Systems
    N. Tsuchida, T. Kuno, Y. Mori, and H. Hasegawa
    Opto-Electronics and Communications Conference, paper T4B.7, Hong Kong, China, July 2021.
    DOI10.1364/oecc.2021.t4b.7
  • Performance Evaluation of Dynamic Fiber-Granular Routing Networks with Next-Generation Optical Paths
    T. Matsuo, R. Shiraki, Y. Mori, and H. Hasegawa
    Opto-Electronics and Communications Conference, paper T2A.8, Hong Kong, China, July 2021.
    DOI10.1364/oecc.2021.t2a.8
  • Estimation for IQ skew of a transmitter in digital coherent communication systems
    N. Tsuchida, T. Kuno, Y. Mori, and H. Hasegawa
    2021 Conference on Lasers and Electro-Optics/Europe – European Quantum Electronics Virtual Conferences, paper CI-2.5, Munich, Germany, June 2021.
    DOI10.1109/cleo/europe-eqec52157.2021.9542509
  • Experimental Evaluation of Optical Cross-Connects with Flexible Waveband Routing Function for SDM Networks
    T. Kuno, Y. Mori, S. Subramaniam, M. Jinno, and H. Hasegawa
    OSA Optical Fiber Communication Conference, paper Th4E.3, San Diego, USA, June 2021.
    DOI10.1364/ofc.2021.th4e.3
  • Evaluation of low-complexity digital coherent receivers for short-reach transmission systems
    T. Kuno, Y. Mori, H. Hasegawa
    Society of Photo-Optical Instrumentation Engineers OPTO, paper 11712-9, San Francisco, USA, March, 2021.
    DOI10.1117/12.2577542

2020

  • Large-Scale Optical Switch Architectures for Intra-Datacentre Networks
    Y. Mori and K. Sato
    European Conference on Optical Communications, paper Tu5J-1, Brussels, Belgium, December 2020.
    DOI10.1109/ecoc48923.2020.9333256Invited Tutorial
  • Joint pre-emphasis and partial-response coding for spectrum narrowing caused by repeated optical-node traversal in ultra-dense WDM networks
    K. Okamura, Y. Mori, and H. Hasegawa
    European Conference on Optical Communications, paper Mo2D-8, Brussels, Belgium, December 2020.
    DOI10.1109/ecoc48923.2020.9333222
  • Demonstration of 4.3 Pbps Optical Circuit Switching for Intra-Datacentre Networks Based on Spatial Super-Channels
    E. Honda, Y. Mori, H. Hasegawa, and K. Sato
    European Conference on Optical Communications, paper Th1J-1, Brussels, Belgium, December 2020.
    DOI10.1109/ecoc48923.2020.9333047
  • Large-Scale and Fast Optical Circuit Switch for Coherent Detection Using Tunable Local Oscillators Formed with Wavelength Bank and Widely-Tunable Silicon Ring Filters
    R. Matsumoto, R. Konoike, H. Matsuura, K. Suzuki, T. Inoue, Y. Mori, K. Ikeda, S. Namiki, and K. Sato
    European Conference on Optical Communications, paper Th1J-2, Brussels, Belgium, December 2020.
    DOI10.1109/ecoc48923.2020.9333235
  • Evaluation of Optical Circuit Switches for SDM-Based Intra-Datacenter Networks
    E. Honda, Y. Mori, H. Hasegawa, and K. Sato
    OptoElectronics and Communications Conference, T1-3.4, Taipei, Taiwan, October 2020.
    DOI10.1109/oecc48412.2020.9273537
  • Resource Assignment based on Core-State Value Evaluation for Crosstalk and Spectrum fragments in SDM Elastic Optical Networks
    Y. Wang, Y. Mori, and H. Hasegawa
    Opto-Electronics and Communications Conference, paper T8-2.6, Taipei, Taiwan, October 2020.
    DOI10.1109/oecc48412.2020.9273621
  • Low-Complexity DSP Configuration for Short-Reach Transmission Systems
    T. Kuno, Y. Mori and H. Hasegawa
    Opto-Electronics and Communications Conference, paper VP95, Taipei, Taiwan, October 2020.
    DOI10.1109/oecc48412.2020.9273542
  • Low-Complexity Digital Coherent Receivers for Short-Reach Transmission Systems
    T. Kuno, Y. Mori and H. Hasegawa
    2020 IEEE Photonics Conference, paper WG2.2, Vancouver, BC, Canada, October 2020.
    DOI10.1109/ipc47351.2020.9252306
  • High-Throughput and High-Port-Count Optical Cross-Connects Using Flexible Waveband Routing
    T. Kuno, Y. Mori, S. Subramaniam, M. Jinno, and H. Hasegawa
    International Conference on Optical Network Design and Modeling, paper S6.4, Barcelona, Spain, May 2020.
    DOI10.23919/ondm48393.2020.9133005
  • Highly spectrally efficient metro networks that adopt fiber-level granular routing on overlaid line-/ring-shaped virtual topologies
    R. Shiraki, Y. Mori, H. Hasegawa, K. Sato, and P. Monti
    Society of Photo-Optical Instrumentation Engineers OPTO, paper 10308-17, San Francisco, USA, Feb. 2020.
    DOI10.1117/12.2545553
  • Quasi-Nyquist WDM networks using receiver-side quadrature duo-binary/quaternary spectrum shaping
    K. Okamura, Y. Mori, H. Hasegawa, and K. Sato
    Society of Photo-Optical Instrumentation Engineers OPTO, paper 10308-12, San Francisco, USA, Feb. 2020.
    DOI10.1117/12.2544195
  • A 2.15 Pbps throughput optical cross-connect with flexible waveband routing
    T. Kuno, Y. Mori, and H. Hasegawa
    IEEE International Conference on Photonics, paper D1AM-S3, Kelantan, Malaysia, March 2020.
    DOI10.1109/icp46580.2020.9206471
  • High-throughput optical circuit switch for intra-datacenter networks based on spatial super-channels
    E. Honda, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference, paper W1F.2, San Diego, USA, March 2020.
    DOI10.1364/ofc.2020.w1f.2
  • Dynamically controlled flexible-grid networks based on semi-flexible spectrum assignment and network-state-value evaluation
    R. Shiraki, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference, paper M1B.4, San Diego, USA, March 2020.
    DOI10.1364/ofc.2020.m1b.4
  • Scalable and fast optical circuit switch created with silicon-photonic tunable-filter-based local oscillator bank and colorless coherent detection
    R. Matsumoto, T. Inoue, R. Konoike, H. Matsuura, K. Suzuki, Y. Mori, K. Ikeda, S. Namiki, and K. Sato
    OSA Optical Fiber Communication Conference, paper W2A.36, San Diego, USA, March 2020.
    DOI10.1364/ofc.2020.w2a.36

2019

  • Ultra-wideband ROADM
    Y. Mori
    Workshop on Ultra-Wideband Communications, European Conference on Optical Communication, Dublin, Ireland, September 2019.
    Invited Paper
  • Intra- and inter-datacentre converged networks utilising Kramers-Kronig receivers
    E. Honda, Y. Mori, H. Hasegawa, and K. Sato
    European Conference on Optical Communication, paper Th.1.A.5, Dublin, Ireland, September 2019.
    DOI10.1049/cp.2019.0966
  • Dynamic control of transparent optical networks with adaptive state-value assessment enabled by reinforcement learning
    R. Shiraki, Y. Mori, H. Hasegawa, and K. Sato
    International Conference on Transparent Optical Networks, paper Sa.A3.4, Angers, France, July 2019. Best student oral presentation award
    DOI10.1109/icton.2019.8840405
  • Feasibility test of large-scale (1,424×1,424) optical circuit switches utilizing commercially available tunable lasers
    E. Honda, Y. Mori, H. Hasegawa, and K. Sato
    OptoElectronics and Communications Conference / International Conference on Photonics in Switching and Computing, paper WA1-3, Fukuoka, Japan, July 2019.
    DOI10.23919/ps.2019.8817773
  • Evaluation of WSS Characteristics in highly dense WDM networks
    K. Okamura, S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
    OptoElectronics and Communications Conference / International Conference on Photonics in Switching and Computing , paper MF2-5, Fukuoka, Japan, July 2019.
    DOI10.23919/ps.2019.8817848
  • High-port-count optical cross-connect using single-module M×M wavelength-selective switches
    Y. Mori, H. Hasegawa, and Ken-ichi Sato
    International Symposium on Extremely Advanced Transmission Technologies, Ise, Japan, May 2019.
    Invited Paper
  • Quasi-Nyquist WDM networks using widely deployed wavelength-selective switches
    R. Shiraki, Y. Mori, H. Hasegawa, and K. Sato
    International Symposium on Extremely Advanced Transmission Technologies, Ise, Japan, May 2019.
    DOI10.1364/ofc.2019.m1a.7
  • Design of survivable coarse/fine hybrid granular routing optical networks based on iterative path-pair-loop inflation
    K. Itakura, Y. Mori, H. Hasegawa, and K. Sato
    International Conference on the Design of Reliable Communication Networks, Coimbra, Portugal, March 2019.
    DOI10.1109/drcn.2019.8713705
  • Verification of high performance and wide applicability of seamlessly expandable and limitless OXC
    R. Hashimoto, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference, paper W2A.24, San Diego, USA, March 2019.
    DOI10.1364/ofc.2019.w2a.24
  • Demonstration of quasi-Nyquist WDM networks using widely deployed wavelength-selective switches
    R. Shiraki, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference , paper M1A.7, San Diego, USA, March 2019.
    DOI10.1364/ofc.2019.m1a.7
  • Novel network architecture enabling quasi-Nyquist wavelength-division multiplexing
    R. Shiraki, S. Yamaoka, Y. Mori, H. Hasegawa, K. Sato
    Society of Photo-Optical Instrumentation Engineers OPTO, paper 10946-11, San Francisco, USA, Feb. 2019.
    DOI10.1117/12.2507449

2018

  • Novel demodulation framework based on quadrature duo-binary/quaternary/octernary spectrum shaping and MLSE for mitigating spectrum narrowing caused by node traversals
    S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
    European Conference on Optical Communication, paper Mo4F.5, Rome, Italy, September 2018.
    DOI10.1109/ecoc.2018.8535336
  • Fast optical circuit switch using monolithically integrated silicon-photonic space switch and wavelength-tuneable filter
    Y. Mori, M.-E. Ganbold, R. Shiraki, K. Suzuki, H. Matsuura, H. Kawashima, S. Namiki, K. Ikeda, and K. Sato
    European Conference on Optical Communication, paper Mo3H.4, Rome, Italy, September 2018.
    DOI10.1109/ecoc.2018.8535398
  • A new framework for nation-wide networking in future datacenter-traffic centric era
    K. Kayano, Y. Mori, H. Hasegawa, K. Sato, F. Inuzuka, A. Hirano
    OSA Photonics Switching and Computing, paper Fr3A.5, Limassol, Cyprus, September 2018.
    DOI10.1109/ps.2018.8751341
  • Architecture and design of quasi-Nyquist WDM networks with flexible grid granular switching
    R. Shiraki, Y. Mori, H. Hasegawa, K. Sato
    OSA Photonics Switching and Computing, paper Fr3A.5, Limassol, Cyprus, September 2018.
    DOI10.1109/ps.2018.8751408
  • Novel FM-Noise spectrum measurement based on three-wave interference
    S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
    Pacific Rim Conference on Lasers and Electro-Optics, paper W4I.7, Hong Kong, China, July 2018.
    DOI10.1364/cleopr.2018.w4i.7
  • Novel demodulation algorithm based on duo-binary spectrum shaping and MLSE for mitigating spectrum narrowing caused by multiple node traversals
    S. Yamaoka, Y. Mori, H. Hasegawa, and K. Sato
    Signal Processing in Photonic Communications in OSA Advanced Photonics Congress, paper SpW1G.5, Zurich, Swiss, July 2018.
    DOI10.1364/sppcom.2018.spw1g.5
  • 1,024x1,024 optical circuit switch using wavelength-tunable and bandwidth-variable silicon photonic filter
    M.-E. Ganbold, H. Nagai, Y. Mori, H. Hasegawa, and K. Sato
    Photonic Networks and Devices in OSA Advanced Photonics Congress, paper SpW1G.5, Zurich, Swiss, July 2018. Best Student Paper Award 1st Prize
    DOI10.1364/networks.2018.neth1f.4
  • Dynamic routing and spectrum assignment for multi-fiber elastic optical networks
    J. Wu, S. Subramaniam, and H. Hasegawa
    OSA Advanced Photonics Congress 2018, paper NeTu4F., Zurich, Swiss, July 2018.
    DOI10.1364/networks.2018.netu4f.1
  • Assessment of optical cross-connect architectures for the creation of next generation optical networks
    M.-E. Ganbold, T. Yasuda, Y. Mori, H. Hasegawa, and K. Sato
    OptoElectronics and Communications Conference, paper 6A1-5, Jeju, Korea, July 2018.
    DOI10.1109/oecc.2018.8729881
  • Next-generation ROADM employing bandwidth-adaptive silicon-photonic filters for flexible drop operation
    Y. Mori, K. Ueda, K. Suzuki, H. Matsuura, K. Tanizawa, K. Ikeda, S. Namiki, H. Kawashima, and K. Sato
    OSA Optical Fiber Communication Conference, paper Th3H.5, San Diego, USA, March 2018.
    DOI10.1364/ofc.2018.th3h.5
  • Large-scale optical circuit switch architecture for intra-datacenter networking
    Y. Mori and K. Sato
    OSA Optical Fiber Communication Conference, paper Th3H.3, San Diego, USA, March 2018.
    DOI10.1364/ofc.2018.th3h.3Invited Paper
  • Spectrally efficient and highly resilient grouped routing network enhanced with optical performance monitoring
    K. Kayano, H. Saito, Y. Mori, H. Hasegawa, K. Sato, S. Oda, S. Yoshida, and T. Hoshida
    OSA Optical Fiber Communication Conference, paper M3J.8, San Diego, USA, March 2018.
    DOI10.1364/ofc.2018.m3j.8
  • Fragmentation-minimized transponder upgrading employing channel bandwidth aligned slot allocation in flexible grid optical networks
    H. Hasegawa, T. Yasuda, Y. Mori, and K. Sato
    OSA Optical Fiber Communication Conference, paper M3J.6, San Diego, USA, March 2018.
    DOI10.1364/ofc.2018.m3j.6
  • Spectral utilization efficient coarse granular routing optical networks with resiliency against multiple failures
    T. Ishikawa, Y. Mori, H. Hasegawa, and K. Sato
    International Conference on the Design of Reliable Communication Networks , Paris, France, February 2018.
    DOI10.1109/icin.2018.8401584
  • Large-scale optical node architecture enabling spectral-efficiency maximization in ultra-dense WDM networks
    S. Yamaoka, R. Hashimoto, Y. Mori, H. Hasegawa, and K. Sato
    Society of Photo-Optical Instrumentation Engineers OPTO, paper 10560-15, San Francisco, USA, Feb. 2018.
    DOI10.1117/12.2288270
  • Demonstration of 153.6-Tbps throughput from 1,536x1,536 optical switch with uniform-loss and cyclic-frequency AWGs
    H. Nagai, Y. Mori, H. Hasegawa, and K. Sato
    Society of Photo-Optical Instrumentation Engineers OPTO, paper 10560-24, San Francisco, USA, Feb. 2018. Optical communications best technical paper award
    DOI10.1117/12.2288268

2017

  • Joint banding-node placement and resource allocation for multi-granular elastic optical networks
    J. Wu, M. Xu, S. Subramaniam, and, H. Hasegawa
    IEEE Global Communications Conference , paper 17506266, Singapore, December 2017.
    DOI10.1109/glocom.2017.8254764
  • Joint pre-, inline-, and post-compensation of spectrum narrowing caused by traversing multiple optical nodes
    Y. Mori, H. Hasegawa, and K. Sato
    European Conference on Optical Communication, paper P1.SC3.45, Gothenburg, Sweden, September 2017.
    DOI10.1109/ecoc.2017.8345928
  • First demonstration of subsystem-modular optical cross-connect using single-module 6x6 WSS
    R. Hashimoto, S. Yamaoka, Y. Mori, H. Hasegawa, K. Sato, K. Yamaguchi, K. Seno, and K. Suzuki
    European Conference on Optical Communication , paper Tu.2.F.2, Gothenburg, Sweden, September 2017. Top-scoring paper
    DOI10.1109/ecoc.2017.8346156
  • Silicon photonics C-band tunable filter for large-scale optical circuit switches
    K. Suzuki, K. Tanizawa, S. Suda, H. Matsuura, K. Ikeda, Y. Mori, K. Sato, S. Namiki, and H. Kawashima
    Opto-Electronics and Communications Conference and Photonics Global Conference, paper P3-128, July/August 2017.
    DOI10.1109/cleopr.2017.8118685
  • Novel subcarrier multiplexing and subcarrier-synchronous phase estimation tolerant to laser phase noise
    D. Martinez, Y. Mori, H. Hasegawa, and K. Sato
    OSA Signal Processing in Photonics Communications, paper SpW1F, New Orleans, Louisiana, USA, July 2017.
    DOI10.1364/sppcom.2017.spw1f.5
  • Theory and progress of large-scale optical switching and elastically hybrid optical switching
    H. Hasegawa and K. Sato
    International Conference on Photonics in Switching, New Orleans, Louisiana, USA, July 2017.
    DOI10.1364/ps.2017.pm2d.1Invited Paper
  • Novel laser-linewidth measurement based on three-wave interference using digital coherent receiver
    S. Yamaoka, Y. Mori, and K. Sato
    the Conference on Lasers and Electro-Optics/Europe and the European Quantum Electronics Conference , paper CI-6.2, Munich, Germany, June 2017.
    DOI10.1109/cleoe-eqec.2017.8086952
  • Large-scale optical circuit switch architecture for intra-datacentre networking
    Y. Mori, K. Ueda, H. Hasegawa, and K. Sato
    the Conference on Lasers and Electro-Optics/Europe and the European Quantum Electronics Conference, paper CI-5.3, Munich, Germany, June 2017.
    DOI10.1109/cleoe-eqec.2017.8086948Invited Paper
  • Routing, fiber, band, and spectrum assignment for multi-granular elastic optical networks
    J. Wu, M. Xu, S. Subramaniam, and H. Hasegawa
    IEEE International Conference on Communications, paper 17065729, Paris, France, May 2017.
    DOI10.1109/icc.2017.7997411
  • Large scale optical circuit switches for future data center applications
    Y. Mori
    Workshop in International Conference on Optical Network Design and Modeling, Budapest, Hungary, May 2017.
    Invited Paper
  • Dynamic control of coarse/fine hybrid granular routing optical networks
    Y. Ito, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference, paper Th4F.3, Los Angeles, USA, March 2017.
    DOI10.1364/ofc.2017.th4f.3
  • Highly reliable large-scale optical cross-connect architecture utilizing MxM wavelength-selective switches
    S. Yamakami, M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference, paper Th3K.5, Los Angeles, USA, March 2017.
    DOI10.1364/ofc.2017.th3k.5
  • Optical tunable filter for gridless ROADM
    M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference, paper Tu3F.4, Los Angeles, USA, March 2017.
    DOI10.1364/ofc.2017.tu3f.4
  • Novel intra- and inter-datacenter converged network exploiting space- and wavelength-dimensional switches
    K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference, paper M3K.2, Los Angeles, USA, March 2017.
    DOI10.1364/ofc.2017.m3k.2
  • Efficient network expansion strategy for elastic optical networks that considers channel capacity upgrades
    T. Yasuda, Y. Mori, H. Hasegawa, and K. Sato
    Society of Photo-Optical Instrumentation Engineers OPTO, paper 10129-8, San Francisco, USA, Feb. 2017.
    DOI10.1117/12.2250489
  • Impairment mitigation in noncoherent optical transmission enabled with machine learning for intra-datacenter networks
    K. Ito, Y. Mori, H. Hasegawa, K. Sato
    Society of Photo-Optical Instrumentation Engineers OPTO, paper 10131-9, San Francisco, USA, Feb. 2017.
    DOI10.1117/12.2253456

2016

  • Large-scale intra-datacenter switch using silicon-photonic multicast switches and tunable filters
    Y. Mori, K. Ueda, K. Suzuki, H. Matsuura, K. Tanizawa, S. Suda, K. Ikeda, S. Namiki, H. Kawashima, S. Nakamura, S. Yanagimachi, A. Tajima, and K. Sato
    Victories 2016, Akihabara, Tokyo, November 2016.
  • Large-scale and simple-configuration optical switch enabled by asymmetric-port-count subswitches
    K. Ueda, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
    IEEE Photonics Conference, paper ThG1.2, Hawaii, USA, October 2016.
  • Novel optical-node architecture utilizing asymmetric-multiport wavelength-selective switches
    M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
    IEEE Photonics Conference, paper WD2.4, Hawaii, USA, October 2016.
  • Highly reliable and cost-effective large-scale optical cross-connect architecture
    S. Yamakami, M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
    IEEE Photonics Conference, paper WD2.4, Hawaii, USA, October 2016.
    DOI10.1109/ipcon.2016.7831229
  • Demonstration of virtual direct link optical network
    Y. Ito, M. Niwa, K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
    IEEE Photonics Conference, paper WD1.5, Hawaii, USA, October 2016.
    DOI10.1109/ipcon.2016.7831226
  • Experimental demonstration of 2,160x2,160 optical circuit switch for intra-datacenter networking
    K. Ueda, Y. Mori, H. Hasegawa, K. Sato, H. Matsuura, K Ishii, H. Kuwatsuka, and S. Namiki
    IEEE Photonics Conference, paper MB4.2, Hawaii, USA, October 2016.
    DOI10.1109/ipcon.2016.7830978
  • Evaluation and performance modeling of two OXC architectures
    J. Wu, M. Xu, S. Subramaniam, and H. Hasegawa
    IEEE 37th Sarnoff Symposium, pp. 112-117, Newark, New Jersey, September 2016.
    DOI10.1109/sarnof.2016.7846738Invited Paper
  • Recent progress in large-scale optical switches for intra-datacenter interconnection
    K. Ueda, Y. Mori, H. Hasegwa, and K. Sato
    Progress In Electromagnetics Research Symposium, Session 2P4, Shanghai, China, August 2016.
    DOI10.1109/piers.2016.7734972Invited Paper
  • Spectral-efficiency maximization with subcarrier-multiplexed hybrid-QAM signals adaptive to distance and hop count
    Y. Isono, M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
    European Conference on Optical Communication, paper Th.1.E.3, Düsseldorf, Germany, September 2016.
  • Optical networking utilizing virtual direct links
    Y. Ito, Y. Mori, H. Hasegawa, and K. Sato
    European Conference on Optical Communication, paper W.4.P1.SC6.63, Düsseldorf, Germany, September 2016.
  • MxM WSS based ROADM architecture with topology-insensitive routing performance
    M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
    European Conference on Optical Communication, paper W.4.P1.SC4.38, Düsseldorf, Germany, September 2016.
  • Large-scale optical circuit switch for intra-datacenter networking using silicon-photonic multicast switch and tunable filter
    K. Ueda, Y. Mori, H. Hasegawa, K. Sato, K. Suzuki, H. Matsuura, K. Tanizawa, S. Suda, K. Ikeda, S. Namiki, H. Kawashima, S. Nakamura, S. Yanagimachi, and A. Tajima
    European Conference on Optical Communication, paper W.2.F.2, Düsseldorf, Germany, September 2016.
  • Polarization-independent C-band tunable filter based on cascaded Si-wire asymmetric Mach-Zehnder interferometer
    K. Suzuki, K. Tanizawa, S. Suda, H. Matsuura, K. Ikeda, Y. Mori, K. Sato, S. Namiki, H. Kawashima
    OptoElectronics and Communications Conference / International Conference on Photonics in Switching, paper ME1-2, Nigata, Japan, July 2016.
  • Spectral efficient grouped routing network that applies dynamic optical path grooming
    Y. Terada, Y. Mori, H. Hasegawa, and K. Sato
    OptoElectronics and Communications Conference / International Conference on Photonics in Switching , paper TuA1-1, Nigata, Japan, July 2016.
  • Demonstration of 1,440x1,440 fast optical circuit switch for datacenter networking
    K. Ueda, Y. Mori, H. Hasegawa, H. Matsuura, K. Ishii, H. Kuwatsuka, S. Namiki, T. Watanabe, and K. Sato
    OptoElectronics and Communications Conference / International Conference on Photonics in Switching, paper WF1-3, Nigata, Japan, July 2016.
    Best paper award
  • Hardware scale analysis and prototype development of flexible waveband routing OXCs
    T. Ishikawa, M. Niwa, K. Ueda, Y. Mori, H. Hasegawa, S. Subramaniam, K. Sato, and O. Moriwaki
    OptoElectronics and Communications Conference / International Conference on Photonics in Switching, paper TuA1-1, Nigata, Japan, July 2016.
  • A compact OXC node architecture that exploits dynamic path bundling and routing
    T. Ishikawa, H. Hasegawa, S. Subramaniam, and K. Sato
    20th Conference on Optical Network Design and Modeling, paper S8-3, Cartagena, Spain, May 2016.
    DOI10.1109/ondm.2016.7494078
  • Tipping point for the future scalable OXC -What size MxM WSS is needed?-
    M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference, paper W4B.5, Anaheim, USA, March 2016.
    DOI10.1364/ofc.2016.w4b.5
  • Highly spectral efficient elastic optical network employing grouped optical path routing
    Y. Terada, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference, paper W2A.48, Anaheim, USA, March 2016.
    DOI10.1364/ofc.2016.w2a.48
  • Algorithm for raising OXC port count to meet traffic growth at minimum-cost
    K. Sato, Y. Mori, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference, paper W4B.2, Anaheim, USA, March 2016.
    DOI10.1364/ofc.2016.w4b.2
  • Spectrum utilization maximization in coarse granular optical routing networks that employ fine granular shared protection
    T. Ishikawa, Y. Mori, H. Hasegawa, and K. Sato
    International Conference on the Design of Reliable Communication Networks , pp. 79-86, Paris, France, March 2016.
    DOI10.1109/drcn.2016.7470838
  • Cycle-slip-tolerant decision-boundary creation with machine learning
    H. Kawase, Y. Mori, H. Hasegawa, and K. Sato
    IEEE International Conference on Photonics, paper Com-4, Sarawak, Malaysia, March 2016.
    DOI10.1109/icp.2016.7510026
  • Low-loss and large-scale optical switch utilizing asymmetric-port-count cyclic AWGs
    K. Ueda, Y. Mori, H. Hasegawa, K. Sato, and O. Moriwaki
    IEEE International Conference on Photonics , paper Dev-8, Sarawak, Malaysia, March 2016. Best paper award
    DOI10.1109/icp.2016.7510042
  • Demonstration of 720x720 optical fast circuit switch for intra-datacenter networks
    K. Ueda, Y. Mori, H. Hasegawa, K. Ishii, H. Kuwatsuka, S. Namiki, H. Matsuura, and K. Sato
    Proc. SPIE 9775, Next-Generation Optical Networks for Data Centers and Short-Reach Links III, 977518, San Francisco, USA, February 2016.
    DOI10.1117/12.2211998
  • Real-time optical path control method that utilizes multiple support vector machines for traffic prediction
    H. Kawase, Y. Mori, H. Hasegawa, and K. Sato
    Proc. SPIE 9773, Optical Metro Networks and Short-Haul Systems VII, 977318, San Francisco, USA, February 2016.
    DOI10.1117/12.2209463
  • Architecture and design of optical path networks utilizing waveband virtual links
    Y. Ito, Y. Mori, H. Hasegawa, and K. Sato
    Proc. SPIE 9773, Optical Metro Networks and Short-Haul Systems VII, 977319, San Francisco, USA, February 2016.
    DOI10.1117/12.2209466

2015

  • Shared protected grouped optical path routing network design employing iterative path group relocation
    T. Ishikawa, Y. Mori, H. Hasegawa, and K. Sato
    International Workshop on Reliable Networks Design and Modeling, Munich, Germany, October 2015.
    DOI10.1109/rndm.2015.7324312
  • Novel network control scheme that can substantially reduce link and node costs simultaneously
    Y. Terada, Y. Mori, H. Hasegawa, K. Sato
    European Conference on Optical Communication, paper We.4.5.5, Valencia, Spain, September 2015.
    DOI10.1109/ecoc.2015.7342022
  • Highly scalable and compact ROADM architecture that exploits MxN wavelength-selective switches
    M. Niwa, Y. Mori, H. Hasegawa, and K. Sato
    Photonics in Switching, paper WeII3-2, Florence, Italy, September 2015.
    DOI10.1109/ps.2015.7328975
  • Large-scale optical switch with simplified sub-switch connections for datacenter application
    K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
    Photonics in Switching, paper FrIII2-2, Florence, Italy, September 2015.
    DOI10.1109/ps.2015.7329050
  • Evaluation of frequency utilization enhancement with transmission-characteristics-aware grouped optical path routing
    Y. Terada, Y. Mori, H. Hasegawa, K. Sato, and Takafumi Tanaka
    Photonics in Switching, paper SC4-2, Florence, Italy, September 2015.
    DOI10.1109/ps.2015.7329018
  • Impairment-aware optical multicast tree design with modulation format optimization
    S. Deb, H. Hasegawa, Y. Mori, and K. Sato
    Photonics in Switching, paper SC4-1, Florence, Italy, September 2015.
    DOI10.1109/ps.2015.7329016
  • Comparison of OXC node architectures for WDM and flex-grid optical networks
    J. Wu, S. Subramaniam, and H. Hasegawa
    International Conference on Computer Communication and Networks , paper 15490684, Las Vegas, USA, August 2015.
    DOI10.1109/icccn.2015.7288388Invited Paper
  • Wavelength path signaling for WSS/WBSS combined optical switches in hierarchical optical networks
    T. Miyazawa, T. Hirayama, H. Harai, K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
    International Conference on Transparent Optical Networks , paper Tu.B3.5, Budapest, Hungary, July 2015.
    DOI10.1109/icton.2015.7193432
  • Experimental demonstration of multi-granular optical-path network utilizing wavelength/waveband-selective switches
    K. Ueda, M. Niwa, Y. Mori, H. Hasegawa, K. Sato, T. Miyazawa, and H. Harai
    Opto-Electronics and Communications Conference , paper JThB.15, Shanghai, China, June/July 2015.
    DOI10.1109/oecc.2015.7340123
  • Path accommodation design and reconfiguration for different reliability classes in virtualized multi-layer transport network
    A. Kadohata, T. Tanaka, A. Watanabe, A. Hirano, H. Hasegawa, and K. Sato
    Opto-Electronics and Communications Conference, paper JTuB.24, Shanghai, China, June/July 2015.
    DOI10.1109/oecc.2015.7340190
  • Resilient grouped routing optical networks with finely granular protection
    H. Hasegawa, Y. Mori, and K. Sato
    Optical Networks Design & Modeling, pp. 134-139, Pisa, Italy, May 2015.
    DOI10.1109/ondm.2015.7127287
  • Optimal nonuniform wavebanding in WDM mesh networks
    J. Wu, S. Subramaniam, and H. Hasegawa
    Conference on Optical Network Design and Modeling, paper S5.3, Pisa, Italy, May 2015.
    DOI10.1109/ONDM.2015.7127279
  • Large scale optical cross-connect: architecture, performance analysis, and feasibility demonstration
    H. Hasegawa and K. Sato
    OSA Optical Fiber Communication Conference, paper W3J.1, Los Angeles, USA, March 2015.
    DOI10.1364/ofc.2015.w3j.1
  • Highly scalable subsystem modular OXC nodes that host tailored add/drop mechanism
    H. Ishida, H. Hasegawa, and K. Sato
    OSA Optical Fiber Communication Conference, paper Th2A.47, Los Angeles, USA, March 2015.
    DOI10.1364/ofc.2015.th2a.47
  • Demonstration of large-port-count and compact ROADM that exhibits virtual-C/D/C performance
    S. Takashina, H. Ishida, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
    Optical Fiber Communication Conference, paper W3J.6, Los Angeles, USA, March 2015.
    DOI10.1364/ofc.2015.w3j.6
  • Large-scale optical-switch prototype compactly implemented with novel functional configuration
    K. Ueda, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
    Optical Fiber Communication Conference, paper W3D.1, Los Angeles, USA, March 2015.
    DOI10.1364/ofc.2015.w3d.1
  • Residual capacity aware dynamic control of GRE-based routing optical path networks under traffic growth model
    Y. Terada, Y. Mori, H. Hasegawa, and K. Sato
    Optical Fiber Communication Conference, paper Th1I.6, Los Angeles, USA, March 2015.
    DOI10.1364/ofc.2015.th1i.6
  • A novel routing and frequency slot assignment scheme that can adapt to transmission speed migration
    Z. Shen, T. Kusano, H. Hasegawa, and K. Sato
    Optical Fiber Communication Conference , paper W1I.2, Los Angeles, USA, March 2015.
    DOI10.1364/ofc.2015.w1i.2
  • Router power reduction by active performance control realized with support vector machines
    H. Kawase, H. Hasegawa, and K. Sato
    IEEE International Conference on Computing, Networking and Communication, pp. 530-535, Anaheim, USA, February 2015.
    DOI10.1109/iccnc.2015.7069400
  • A novel optical path routing network that combines coarse granularity optical multicast with fine granularity add/drop and block
    M. M. Soares, Y. Mori, H. Hasegawa, K. Sato
    SPIE Photonics West, paper 93880O, San Francisco, USA, February 2015.
    DOI10.1117/12.2078561

2014

  • Low-loss and low-power-consumption wavelength tunable filter enabling colorless/directionless/contentionless optical drop in ROADMs
    S. Takashina, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
    European Conference on Optical Communication , paper We.3.5.2, Cannes, France, September 2014.
    DOI10.1109/ecoc.2014.6963855
  • Verification of high frequency spectrum utilization in grouped optical path routing networks under traffic growth scenario
    Y. Teraeda, Y. Mori, H. Hasegawa, and K. Sato
    European Conference on Optical Communication, paper Mo.3.1.4, Cannes, France, September 2014.
    DOI10.1109/ecoc.2014.6963932
  • Novel large-port-count optical-switch architecture for optical interconnection in datacenter
    K. Ueda, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
    European Conference on Optical Communication, paper We.3.5.1, Cannes, France, September 2014.
    DOI10.1109/ecoc.2014.6964120
  • Disruption minimized spectrum defragmentation and equalization of bitrate dependent blocking in semi-flexible grid networks
    Z. Shen, H. Hasegawa, and, K. Sato
    Photonics in Switching in OSA Advanced Photonics for Communications, paper PW1B.2, San Diego, USA, July 2014.
    DOI10.1364/ps.2014.pw1b.2
  • Optimum power-budget allocation for large-scale optical switches utilizing cyclic arrayed waveguide gratings
    K. Ueda, Y. Mori, H. Hasegawa, and K. Sato
    Photonics in Switching in OSA Advanced Photonics for Communications, paper JT5B.3, San Diego, USA, July 2014.
    DOI10.1364/ps.2014.jt5c.3
  • Dynamic control of optical path networks by utilizing adaptive wavelength grouping and link fiber selection
    K. Oka, H. Hasegawa, and, K. Sato
    Photonics in Switching in OSA Advanced Photonics for Communications, paper PM4C.2, San Diego, USA, July 2014.
    DOI10.1364/ps.2014.pm4c.2
  • Cost effective and reliable networking that utilizes subsystem modular OXC nodes
    K. Sato, H. Hasegawa, and, K. Sato
    WIN2014 (What-Is-Next), a closed workshop of the AISTs Vertically Integrated Center for Technologies of Optical Routing toward Ideal Energy Savings (VICTORIES project), poster, (2014).
  • A novel semi-flexible grid network utilizing aligned frequency slot assignment
    Z. Shen, H. Hasegawa, and, K. Sato
    WIN2014 (What-Is-Next), a closed workshop of the AISTs Vertically Integrated Center for Technologies of Optical Routing toward Ideal Energy Savings (VICTORIES project), poster, (2014).
  • Blocking performance of multi-stage routing optical path networks
    H.-C. Le, H. Hasegawa, and K. Sato
    OptoElectronics and Communication Conference and Australian Conference on Optical Fibre Technology, paper TU6A-6, Melbourne, Australia, July 2014.
  • Design of reliable optical path networks that consist of large scale subsystem-modular OXC nodes
    K. Sato, H. Hasegawa, and, K. Sato
    OptoElectronics and Communication Conference and Australian Conference on Optical Fibre Technology , paper MO1A-3, Melbourne, Australia, July 2014.
  • A novel flexible grid/semi-flexible grid optical path network design algorithm that reserves exclusive frequency slots for high bitrate signals
    Z. Shen, H. Hasegawa, and, K. Sato
    Conference on Optical Network Design and Modeling , paper S10.3, Stockholm Sweden, May 2014.
  • Design of Grouped Routing Entity (GRE)-based optical networks with 100% signal quality guarantee
    Jirattigalachote, Y. Taniguchi, T. Ban, P. Monti, L. Wosinska, H. Hasegawa, and K. Sato
    Conference on Optical Network Design and Modeling , paper S8.2, Stockholm Sweden, May 2014.
  • Performance evaluations of large-scale OXC that achieves modular and hitless expansion
    Y. Tanaka, H. Hasegawa and K. Sato
    Optical Fiber Communication Conference, paper W2A.50, San Francisco, USA, March 2014.
    DOI10.1364/ofc.2014.w2a.50
  • Hardware scale and performance evaluation of compact OXC add/drop architecture
    H. Ishida, H. Hasegawa and K. Sato
    Optical Fiber Communication Conference, paper W1C.7, San Francisco, USA, March 2014.
    DOI10.1364/ofc.2014.w1c.7
  • Low crosstalk wavelength tunable filter that utilizes symmetric and asymmetric Mach-Zehnder interferometers
    S. Takashina, Y. Mori, H. Hasegawa, and K. Sato
    Optical Fiber Communication Conference, paper Th3F.6, San Francisco, USA, March 2014.
    DOI10.1364/ofc.2014.th3f.6
  • Estimation of OSNR for Nyquist-WDM transmission systems using statistical moments of equalized signals in digital coherent receivers
    Md. S. Faruk, Y. Mori, and K. Kikuchi
    Optical Fiber Communication Conference, paper Th2A.29, San Francisco, USA, March 2014.
    DOI10.1364/ofc.2014.th2a.29
  • Fiber-nonlinearity limitation of transmission distances in ultra-dense gridless photonic networks
    Y. Mori, H. Hasegawa, and K. Sato
    Optical Fiber Communication Conference, paper W2A.33, San Francisco, USA, March 2014.
    DOI10.1364/ofc.2014.w2a.33
  • Enhancement of fiber frequency utilization by employing grouped optical path routing
    Y. Terada, Y. Mori, H. Hasegawa, and K. Sato
    Optical Fiber Communication Conference, paper W1C.6, San Francisco, USA, March 2014.
    DOI10.1364/ofc.2014.w1c.6
  • A 204.8 Tbps throughput 64x64 optical cross-connect prototype that allows C/D/C add/drop
    K. Takaha, Y. Mori, H. Hasegawa, and K. Sato
    Optical Fiber Communication Conference, paper M2K.1, San Francisco, USA, March 2014. Top-scoring paper
    DOI10.1364/ofc.2014.m2k.1
  • Wavelength-tunable filter utilizing non-cyclic arrayed waveguide grating to create colorless/directionless/contentionless ROADMs
    M. Niwa, S. Takashina, Y. Mori, H. Hasegawa, K. Sato, and T. Watanabe
    Proc. SPIE 9388, Optical Metro Networks and Short-Haul Systems VII, 938807, February 2014.
    DOI10.1117/12.2078522
  • Photonic networks that exploit digital coherent technologies
    Y. Mori and K. Sato
    Proc. SPIE 9008, Optical Metro Networks and Short-Haul Systems VI, 900802, February 2014.
    DOI10.1117/12.2038657Invited Paper

2013

  • A comparison of large-scale selective switch-based optical cross-connects
    H.-C. Le, H. Hasegawa, and K. Sato
    IEEE International Conference on Advanced Technologies for Communications, pp. 55-59, Hanoi, Vietnam, October 2013.
    DOI10.1109/atc.2013.6698076
  • Performance evaluations of large-scale OXCs that utilize multi-stage hetero-granular optical path switching
    H.-C. Le, H. Hasegawa, and K. Sato
    European Conference on Optical Communication, paper Th.2.E.3, London, United Kingdom, September 2013.
    DOI10.1049/cp.2013.1548
  • Subsystem modular OXC architecture that achieves disruption free port count expansion
    Y. Tanaka, Y. Iwai, H. Hasegawa, and K. Sato
    European Conference on Optical Communication, paper Th.2.E.4, London, United Kingdom, September 2013.
    DOI10.1049/cp.2013.1549
  • A novel semi-flexible grid optical path network that utilizes aligned frequency slot arrangement
    Z. Shen, H. Hasegawa, K. Sato, T. Tanaka, and, A. Hirano
    European Conference on Optical Communication, paper We.2.E.2, London, United Kingdom, September 2013.
    DOI10.1049/cp.2013.1426
  • Novel polarization-diversity scheme based on mutual phase conjugation for fiber-nonlinearity mitigation in ultra-long coherent optical transmission systems
    H. Lu, Y. Mori, C. Han, and K. Kikuchi
    European Conference on Optical Communication , paper We.3.C.3, London, United Kingdom, September 2013.
    DOI10.1049/cp.2013.1447
  • Wavelength demultiplexing of Nyquist WDM signals under large frequency offsets in digital coherent receivers
    Y. Mori, C. Han, H. Lu, and K. Kikuchi
    European Conference on Optical Communication, paper Mo.4.C.6, London, United Kingdom, September 2013.
    DOI10.1049/cp.2013.1313
  • Development of ultra-compact 8x8 waveband cross-connect
    K. Takaha, T. Ban, H. Hasegawa, K. Sato, H. Takahashi, and M. Okuno
    OptoElectronics and Communications Conference, paper WT2-3, Kyoto, Japan, July 2013.
    DOI10.1364/oecc_ps.2013.wt2_3
  • Evaluation of hardware requirements for largescale OXC architecture employing wavelength switching and fiber selection
    T. Ban, H.-C. Le, H. Hasegawa, and K. Sato
    OptoElectronics and Communications Conference, paper WT2-2, Kyoto, Japan, July 2013.
    DOI10.1364/oecc_ps.2013.wt2_2
  • Performance evaluation of large-scale OXC architectures that utilize intra-node routing restriction
    H.-C. Le, T. Ban, H. Hasegawa, and K. Sato
    OptoElectronics and Communications Conference, paper MQ2-2, Kyoto, Japan, July 2013.
    DOI10.1364/oecc_ps.2013.mq2_2
  • An efficient add/drop architecture for large-scale subsystem-modular OXC
    H. Ishida, H. Hasegawa, and K. Sato
    International Conference on Transparent Optical Networks, paper We.A1.5, Cartagena, Spain, June 2013.
    DOI10.1109/icton.2013.6602914
  • OXC hardware scale reduction attained by using interconnected subsystem architecture
    Y. Iwai, H. Hasegawa, and, K. Sato
    Optical Fiber Communication Conference, paper NW1J.2, Anaheim, USA, March 2013.
    DOI10.1364/nfoec.2013.nw1j.2
  • A 270 X 270 optical cross-connect switch utilizing wavelength routing with cascaded AWGs
    T. Niwa, H. Hasegawa, and, K. Sato
    Optical Fiber Communication Conference, paper OTh1A.3, Anaheim, USA, March 2013.
    DOI10.1364/ofc.2013.oth1a.3
  • Compact integrated tunable filter utilizing AWG routing function and small switches
    T. Niwa, H. Hasegawa, K. Sato, T. Watanabe, H. Takahashi, and S. Soma
    Optical Fiber Communication Conference, paper OW1C.2, Anaheim, USA, March 2013.
    DOI10.1364/ofc.2013.ow1c.2
  • Dynamic grouped routing optical networks for cost effective and agile wavelength services
    Y. Taniguchi, H. Hasegawa, and K. Sato
    Optical Fiber Communication Conference, paper OM3A.5, Anaheim, USA, March 2013.
    DOI10.1364/ofc.2013.om3a.5
  • Impact of wavelength/waveband convertors and the cost bound in hierarchical optical path networks
    Z. Shen, H. Hasegawa, and, K. Sato
    Optical Fiber Communication Conference, paper OM3A.2, Anaheim, USA, March 2013.
    DOI10.1364/ofc.2013.om3a.2
  • Dual-stage phase estimator enabling perfect frequency offset in digital coherent receivers
    Y. Mori and K. Kikuchi
    Optical Fiber Communication Conference, paper OTu3I.7, Anaheim, USA, March 2013.
    DOI10.1364/ofc.2013.otu3i.7
  • Design strategies for survivable grouped routing entity (GRE)-based optical networks
    H. Hasegawa, Y. Taniguchi, K. Sato, A. Jirattigalachote, P. Monti, and L. Wosinska
    International Workshop on the Design of Reliable Communication Networks, pp. 148-154 Budapest, Hungary, March 2013.

2012

  • A novel optical networking scheme utilizing coarse granular optical routing and fine granular add/drop
    Y. Taniguti, Y. Yamada, H. Hasegawa, and K. Sato
    OFC/NFOEC 2012, JW2A.2, Los Angeles, March 4-8, 2012.
  • Colorless/Directionless/Contentionless optical add/drop architecture applying waveband technologies and colorless MUX/DEMUX
    Y. Yamada, R. Hirako, H. Hasegawa, and K. Sato
    OFC/NFOEC 2012, JTh2A.44, Los Angeles, March 4-8, 2012.
  • Evaluations of different optical path add/drop ratio restriction schemes on oxc hardware scale and network resource requirement
    F. Naruse, Y. Yamada, H. Hasegawa, and K. Sato
    OFC/NFOEC 2012, OTh1A.5, Los Angeles, March 4-8, 2012.
  • Compact Wavelength Tunable Filter Fabricated on a PLC Chip that Realizes Colorless/Directionless/Contentionless Drop Function in Optical Cross-Connect
    T. Niwa, R. Hirako, H. Hasegawa, K. Sato, M. Okuno, and T. Watanabe
    OFC/NFOEC 2012, OTh3D.6, Los Angeles, March 4-8, 2012.
  • Impairment-Aware Routing and Waveband Assignment for Efficient Optical Transport Networks
    A. Jirattigalachote, Y. Yamada, C. Cavdar, P. Monti, L. Wosinska, H. Hasegawa, and K. Sato
    OFC/NFOEC 2012, OWA3.2, Los Angeles, March 4-8, 2012.
  • Advances in optical networking technologies to create bandwidth abundant networks
    K. Sato
    WOCC 2012 (2012 21st Annual Wireless and Optical Communications Conference), Kaohsiung, Taiwan, April 19-21, 2012.
  • Optical technologies that create future green networks
    K. Sato
    WIN2012 (What-Is-Next), a closed workshop of the AIST’s Vertically Integrated Center for Technologies of Optical Routing toward Ideal Energy Savings (VICTORIES project), p. 4, Inuyama, Aichi, June 28-29, 2012.
  • Perfirmance of novel network that utilizes grouped optical path routing and fine granular add/drop
    Y. Taniguti, Y. Yamada, H. Hasegawa, and K. Sato
    WIN2012 (What-Is-Next), a closed workshop of the AIST’s Vertically Integrated Center for Technologies of Optical Routing toward Ideal Energy Savings (VICTORIES project), Poster, Inuyama, Aichi, June 28-29, 2012.
  • Hierarchical optical path networks utilizing elecgtrical grooming and regeneration of wavelength paths
    L. H. Chau, H. Hasegawa and K. Sato
    WIN2012 (What-Is-Next), a closed workshop of the AIST’s Vertically Integrated Center for Technologies of Optical Routing toward Ideal Energy Savings (VICTORIES project), p. 4, Inuyama, Aichi, June 28-29, 2012.
  • Design of bandwidth abundant photonic networks that utilize flexible/multi-granular optical path routing
    H. Hasegawa and K. Sato
    OECC 2012, 2012 17thOpto-Electronics and Communications Conference, 3A2-5, Busan, Korea, July 2-5, 2012.
  • Optical technologies for future networks
    K. Sato
    OECC 2012, 2012 17thOpto-Electronics and Communications Conference, Busan, Korea, 5A2-1, July 2-6, 2012.
  • Role of electronics and optics in creating future transport networks
    K. Sato
    14th International Conference on Transparent Optical Networks, ICTON 2012, Mo.C1.2, Warwick, U.K., July 2-5, 2012.
  • Impact of optical transparent reach on the performance of translucent multi-granular optical path networks
    L. H. Chau, H. Hasegawa and K. Sato
    Proceedings of Fourth International Conference on Communications and Electronics (ICCE 2012), Vietnam, pp. 1-6, August 1-3, 2012.
  • Performance evaluation of optical path networks utilizing waveband selective switch-based cross-connects
    L. H. Chau, Tien-Ban Nguyen, H. Hasegawa and K. Sato
    5th International Conference on Advanced Technologies for Communications (ATC 2012), 10-12 October, 2012, Hanoi, Vietnam.
  • Effectiveness of waveband conversion for hierarchical optical path networks and the allowable cost bound
    Z. Shen, H. Hasegawa, and K. Sato
    Photonics in Switching 2012 (PS 2012), Th-S34-O10, Corsica, September 11-14, 2012.
  • Hardware scale reduction in large-port count OXCs exploiting selective switch based coarse granular routing
    Y. Taniguchi, Y. Yamada, H. Hasegawa, and K. Sato
    Photonics in Switching 2012 (PS 2012), We-S31-O03, Corsica, September 11-14, 2012.
  • Compact tunable filter realized with combination of wavelength routing and switch function
    T. Niwa, H. Hasegawa, and K. Sato
    Photonics in Switching 2012 (PS 2012),Th-S23-O06, Corsica, September 11-14, 2012.
  • A Large Capacity Optical Cross-connect Architecture Exploiting Multi-Granular Optical Path Routing
    L. H. Chau, H. Hasegawa and K. Sato
    Photonics in Switching 2012 (PS 2012), Fr-S26-O14, Corsica, September 11-14, 2012.
  • Impairment-aware multicast tree design for hierarchical optical path networks
    Y. Hachisuka, H. Hasegawa, and K. Sato
    Photonics in Switching 2012 (PS 2012), Th-S33-O08, Corsica, September 11-14, 2012.
  • Optical transport network architecture; the future transport node technologies
    K. Sato
    Photonics in Switching 2012 (PS 2012), Th-S33-I04, Corsica, September 11-14, 2012.
  • A novel large-scale OXC architecture that employs wavelength path switching and fiber selection
    T. Ban, H. Hasegawa, K. Sato
    ECOC 2012, We.3.D.1, Amsterdam, September 16-20, 2012.
  • Large-scale photonic node architecture that utilizes interconnected small scale optical cross-connect sub-systems
    Y. Iwai, H. Hasegawa, and K. Sato
    ECOC 2012, We.3.D.3, Amsterdam, September 16-20, 2012.
  • Shared protected elastic optical path network designthat applies iterative re-optimization based on resource utilization efficiency measures
    S. Kosaka, H. Hasegawa, K. Sato, Y. Tanaka, A. Hirano, and M. Jinno
    ECOC 2012, Tu.4.D.5, Amsterdam, September 16-20, 2012.
  • Benefits of Elastic (Flexible) Optical Networks
    K. Sato
    ECOC 2012 Workshop on Cognitive and Flexible Optical Networks, Amsterdam, September 16, 2012.
  • Efficient routing strategies for interconnected small scale OXC sub-system networks
    Y. Iwai, H. Hasegawa, and K. Sato
    ACP 2012, ATh2D.2, Guangzhou (Canton), China, November 7-10, 2012.
  • Performance evaluation of large-scale oxc architecture employing wavelength path switching and fiber selection
    T. Ban, H. Hasegawa, K. Sato, T. Watanabe, and H. Takahashi
    ACP 2012, ATh2D.4, Guangzhou (Canton), China, November 7-10, 2012.
  • Formulation of MUX/DEMUX functions for multipleinput-output port cyclic AWG
    K. Ishii, H. Hasegawa, and K. Sato
    ACP 2012, AS4A.3, Guangzhou (Canton), China, November 7-10, 2012.
  • A novel large-scale wavelength routing switch configuration exploiting small arrayed waveguide gratings
    T. Niwa, R. Hirako, H. Hasegawa, K. Sato, T. Watanabe, and H. Takahashi
    ACP 2012, ATh2C.4, Guangzhou (Canton), China, November 7-10, 2012.
  • Quasi-scheduled optical path routing and wavelength assignment that uses expected traffic variation
    N. Osawa, H. Hasegawa, and K. Sato
    ACP 2012, AS2D.4, Guangzhou (Canton), China, November 7-10, 2012.
  • Design of optical path networks employing large-capacity WSS/WBSS-Combined optical cross-connects
    L. H. Chau, H. Hasegawa and K. Sato
    ACP 2012, AF4A.49, Guangzhou (Canton), China, November 7-10, 2012.
  • Photonic technologies for creating energy efficient networks
    K. Sato
    ACP 2012 Workshop, “Energy Efficient Optical Communications and Networking,” Guangzhou (Canton), China, November 7-10, 2012.

2011

  • Coarse granular routing optical networks for future optical services
    H. Hasegawa and K. Sato
    Proceedings of IWOO2011(6th International Workshop on OPS & OCDMA), p.24, Dec.12-13, 2011, Okinawa, Japan.
  • OOO switching – The role and technological advances
    K. Sato
    OFC/NFOEC 2011, NThB1, Los Angeles, March 6-10, 2011.
  • Hybrid optical wdm networks utilizing optical waveband and electrical wavelength cross-connect
    L. H. Chau, H. Hasegawa and K. Sato
    OFC/NFOEC 2011, NMC3, Los Angeles, March 6-10, 2011.
  • PLC-based compact optical cross-connect node for roadm ring network connection
    K. Noguchi, O. Moriwaki, H. Takahashi, T. Sakamoto, M. Okuno, and K. Sato
    OFC/NFOEC 2011, NThB2, Los Angeles, March 6-10, 2011.
  • Novel hierarchical optical cross-connect architecture utilizing dedicated add/drop switches that effectively offer colorless and directionless capability
    Y. Yamada, H. Hasegawa, and K. Sato
    OFC/NFOEC 2011, OThR6, Los Angeles, March 6-10, 2011.
  • Dynamic routing and frequency slot assignment for elastic optical path networks that adopt distance adaptive modulation
    T. Takagi, H. Hasegawa, K. Sato, Y. Sone, B. Kozicki, A. Hirano, and M. Jinno
    OFC/NFOEC 2011, OTuI7, Los Angeles, March 6-10, 2011.
  • Optical network design algorithms that consider optical path add/drop ratio restrictions for oxc hardware scale reduction
    F. Naruse, Y. Yamada, H. Hasegawa, and K. Sato
    OFC/NFOEC 2011, NThC3, Los Angeles, March 6-10, 2011.
  • Flexible and compact hierarchical optical cross-connect node with waveband add/drop restriction
    R. Hirako, K. Ishii, H. Hasegawa, K. Sato, H. Takahashi, and M. Okuno
    OFC/NFOEC 2011, OTuE5, Los Angeles, March 6-10, 2011.
  • Role of optics in creating future transport networks
    K. Sato
    13th International Conference on Transparent Optical Networks, ICTON 2011, Stockholm, June 27-30, 2011.
  • Photonic network technologies for the cloud era
    K. Sato
    16th Opto-Electronics and Communications Conference, OECC 2011, Workshop I, What photonic technology will play the leading role in the upcoming cloud era?, Kaohsiung, Taiwan, July 4-8 2011.
  • Development of large capacity ultra-compact waveband cross-connect
    T. Ban, K. Ishii, H. Hasegawa, K. Sato, H. Takahashi, and M. Okuno
    16th Opto-Electronics and Communications Conference, OECC 2011, 6A1-2, Kaohsiung, Taiwan, July 4-8 2011.
  • Development of single plc-chip waveband selective switch that has extra ports for grooming and termination
    R. Hirako, K. Ishii, H. Hasegawa, K. Sato, H. Takahashi, and M. Okuno
    16th Opto-Electronics and Communications Conference, OECC 2011, 7E1-4, Kaohsiung, Taiwan, July 4-8 2011.
  • Recent developments in and challenges of elastic optical path networking
    K. Sato
    ECOC 2011 - 37th European Conference and Exhibition on Optical Communication, Mo.2.K.1, Geneva, September 18-22, 2011.
  • Impact of electrical grooming and regeneration of wavelength paths in creating hierarchical optical path networks
    L. H. Chau, H. Hasegawa and K. Sato
    ECOC 2011 - 37th European Conference and Exhibition on Optical Communication, We.8.K.2, Geneva, September 18-22, 2011.
  • Compact hierarchical optical cross-connect utilizing newly designed waveband selective switch with extra ports for grooming
    R. Hirako, K. Ishii, H. Hasegawa, K. Sato, H. Takahashi, and M. Okuno
    ECOC 2011 - 37th European Conference and Exhibition on Optical Communication, Th.12.A.4, Geneva, September 18-22, 2011.
  • Disruption minimized spectrum defragmentation in elastic optical path networks that adopt distance adaptive modulation
    T. Takagi, H. Hasegawa, K. Sato, Y. Sone, A. Hirano, and M. Jinno
    ECOC 2011 - 37th European Conference and Exhibition on Optical Communication, Mo.2.K.3, Geneva, September 18-22, 2011.
  • Design of hierarchical optical path networks that utilize wavelength conversion and evaluation of the allowable cost bound
    Z. Shen, H. Hasegawa, and K. Sato
    ACP 2011 (Asia Communications and Photonics Conference and Exhibition 2011), Shanghai, November 13-16, 2011.
  • Design algorithm of waveband multicast tree in hierarchical optical path networks that utilizes grouping of destination node sets
    Y. Hachisuka, H. Hasegawa, and K. Sato
    ACP 2011 (Asia Communications and Photonics Conference and Exhibition 2011), Shanghai, November 13-16, 2011.
  • Multi-domain path control system for large-scale photonic networks
    S. Araki, H. Hasegawa, and K. Sato
    ACP 2011 (Asia Communications and Photonics Conference and Exhibition 2011), Shanghai, November 13-16, 2011. (NEC)
  • The path to fully flexible optical network
    K. Sato
    ACP 2011 (Asia Communications and Photonics Conference and Exhibition 2011), Shanghai, November 13-16, 2011.
  • The role of multi-granular optical paths
    K. Sato
    ACP 2011 (Asia Communications and Photonics Conference and Exhibition 2011), Shanghai, November 13-16, 2011.
  • Role of optical technologies to create future transport networks
    K. Sato
    ACP 2011 (Asia Communications and Photonics Conference and Exhibition 2011), Workshop WK1: Spectrally and Energy-Efficient Optical Transport Systems and Subsystems, Shanghai, November 13-16, 2011.
  • Efficient iterative design algorithm for enhancing resource utilization of shared protected optical path networks
    M. Sato, H. Hasegawa and K. Sato
    Proc. of the 2011 8th International Workshop on the Design of Reliable Communication Networks (DRCN), Krakow, Poland, October 10-12, 2011pp. 102-109.
  • PCE-based scalable dynamic path control for large-scale photonic networks
    S. Araki, K. Shimada, H. Hasegawa, K. Sato, Y. Iizawa, S. Ishida, I. Nishioka
    SPIE Photonics West 2011, Conference 7959: Optical Metro Networks and Short-Haul Systems III, Paper 7959-17, January 27, 2011.
  • A dynamic path control method applying traffic-prediction-based route pre-prioritization
    H. Ohno, H. Hasegawa, K. Sato
    ACP 2011 (Asia Communications and Photonics Conference and Exhibition 2011), 8310-06, Shanghai, November 13-16, 2011.

2010

  • A new multi-state route scheduling algorithm based on traffic prediction
    K. Obara, H. Hasegawa, K. Sato
    ONDM 2010 (14th Conference on Optical Network Design and Modeling), Kyoto, Japan, February 1-3, 2010.
  • Impacts of waveband capacity and waveband add/drop ratio on the performance of ROADM-Ring connecting hierarchical optical path cross-connects
    K. Ishii, H. Hasegawa, K. Sato
    OFC/NFOEC 2010, NMD1, San Diego, March 21-25, 2010.
  • Adaptive self-reconfigurable network to create cost-effective bandwidth-on-demand services
    M. Nakagawa, H. Hasegawa, K. Sato, T. Takeda, and K. Shiomoto
    OFC/NFOEC 2010, NWA2, San Diego, March 21-25, 2010.
  • Demonstration of compact hierarchical optical path cross-connect utilizing wavelength/waveband selective switches
    S. Mitsui, H. Hasegawa and K. Sato, S. Kamei, H. Takahashi, and M. Okuno
    OFC/NFOEC 2010, NThF4, San Diego, March 21-25, 2010.
  • Role and opportunities of photonics in future networks
    K. Sato
    IEEE Photonics Society Winter Topicals 2010, Keynote, MC1.1, Majorca, Spain, January 11-13, 2010.
  • Next Generation Transport Network Architecture
    K. Sato
    OFC/NFOEC 2010, invited, OWR1, San Diego, March 21-25, 2010.
  • Are all optical network manageable?
    K. Sato
    OFC/NFOEC 2010, Workshop OMF, San Diego, March 22, 2010.
  • Terabit-scale compact hierarchical optical cross-connect system employing PLC devices and optical backplane
    Moriwaki, K. Noguchi, H. Takahashi, T. Sakamoto, K. Sato, H. Hasegawa, M. Okuno, and Y. Ohmori
    OFC/NFOEC 2010, Post Deadline Paper, PDPC9, San Diego, March 25, 2010.
  • Multi-granularity waveband- and wavelength- path network
    K. Sato
    CLEO 2010, Conference on Lasers and Electro-Optics, CFJ1, San Hose, May16-21, 2010.
  • Optical fast circuit switching networks applying waveband grooming
    T. Ogawa, Y. Yamada, H. Hasegawa, K. Sato
    COIN 2010 (9th International Conference on Optical Internet), July 11-14, 2010, Jeju, Korea.
  • A dynamic routing algorithm for multi-domain photonic networks using maximum flow information between domain boundaries
    K. Shimada, S. Araki, H. Hasegawa, and K. Sato
    COIN 2010 (9th International Conference on Optical Internet), July 11-14, 2010, Jeju, Korea.
  • Performance test of ultra-compact waveband cross-connect module
    K. Ishii, H. Hasegawa, K. Sato, M. Okuno, and H. Takahashi
    COIN 2010 (9th International Conference on Optical Internet), July 11-14, 2010, Jeju, Korea.
  • The path to energy efficient optical networking
    K. Sato
    Photonics in Switching 2010, Plenary/Invited, JTuA2, Monterey, California, July 25-28, 2010.
  • Optical technologies that enable Green networks
    K. Sato
    12th International Conference on Transparent Optical Networks, ICTON 2010, Plenary, Mo.A.2, Munich, June 27-July 1, 2010.
  • Hierarchical optical path network design for future peta-bit class networks
    H. Hasegawa and K. Sato
    invited, OECC 2010, 9A4-1, Sapporo, Japan, July 5-9, 2010.
  • Cost evaluation of hybrid-hierarchical optical cross-connects based optical path network
    L. H. Chau, H. Hasegawa and K. Sato
    The Third International Conference on Communications and Electronics 2010, ICCE 2010, Nha Trang, Vietnam, August 11 - 13, 2010.
  • Coarse granular routing in optical path networks and impact of supplemental intermediate grooming
    Y. Yamada, H. Hasegawa, and K. Sato
    ECOC 2010 - 36th European Conference and Exhibition on Optical Communication, Th.10.F.1, Torino, September 19-23, 2010.
  • Development of compact hierarchical optical path cross-connect prototype utilizing integrated colorless multi/demultiplexers
    R. Hirako, K. Ishii, H. Hasegawa, and K. Sato
    ECOC 2010 - 36th European Conference and Exhibition on Optical Communication, We.8.A.5, Torino, September 19-23, 2010.
  • Algorithms for maximizing spectrum efficiency in elastic optical path networks that adopt distance adaptive modulation
    T. Takagi, H. Hasegawa, K. Sato, T. Tanaka, Y. Sone, A. Watanabe, A. Hirano, B. Kozicki, T. Takara, and M. Jinno
    ECOC 2010 - 36th European Conference and Exhibition on Optical Communication, We.8.D.5, Torino, September 19-23, 2010.
  • Role of optics and electronics in creating future broadband networks
    K. Sato
    ECOC 2010, -36th European Conference and Exhibition on Optical Communication, We.6.F.2, Torino, September 19-23, 2010.
  • Hybrid hierarchical optical path network design algorithm applying a 2-stage ILP optimization
    L. H. Chau, H. Hasegawa and K. Sato
    Asia Communications and Photonics Conference and Exhibition 2010, ACP 2010, ThD3, Shanghai, December 9-11, 2010.
  • Ring connecting node architecture employing variable filter
    T. Oono, K. Ishii, H. Hasegawa, K. Sato
    Asia Communications and Photonics Conference and Exhibition 2010, ACP 2010, ThH4, Shanghai, December 9-11, 2010.
  • Switch scale evaluation for optical cross-connects considering add/drop ratio restriction
    R. Hirako, K. Ishii, H. Hasegawa, K. Sato
    Asia Communications and Photonics Conference and Exhibition 2010, ACP 2010, ThH3, Shanghai, December 9-11, 2010.
  • The future transport node technologies
    K. Sato
    Asia Communications and Photonics Conference and Exhibition 2010, ACP 2010, SI1, Shanghai, December 9-11, 2010.

2009

  • New dynamic network design and provisioning algorithms for broadband connection services considering fairness
    M. Nakagawa, H. Hasegawa, K. Sato, R. Sugiyama, T. Takeda, E. Oki, and K. Shiomoto
    ONDM 2009 (13th Conference on Optical Network Design and Modeling), Braunschweig, Germany, February 18-20, 2009, Paper #1569164809.
  • Survivable hierarchical optical path networks employing waveband and wavelength path protection
    Y. Yamada, H. Hasegawa and K. Sato
    OFC 2009, OWY3, San Diego, March 22-26, 2009.
  • An Ultra-compact Waveband Cross-connect Switch Module to Create Cost-effective Multi-degree Reconfigurable Optical Node
    K. Ishii, H. Hasegawa, K. Sato, M. Okuno, S. Kamei, and H. Takahashi
    ECOC 2009 -35th European Conference on Optical Communication, Vienna, Austria, September 20-24, 2009, 4.2.2.
  • Efficient ROADM-ring Connecting Node Switch Architecture that Utilizes Waveband Routing and its Realization with PLC Technologies
    K. Ishii, O. Moriwaki, H. Hasegawa, K. Sato, Y. Jinnouchi, M. Okuno, and H. Takahashi
    ECOC 2009 (35th European Conference on Optical Communication), Vienna, Austria, September 20-24, 2009, 5.3.1.
  • Route and Wavelength/Waveband Assignment for Creation of Compact Hierarchical Optical Cross-Connect for Multi-Ring Connection
    K. Ishii, H. Hasegawa, K. Sato
    ECOC 2009 - 35th European Conference and Exhibition on Optical Communication, Vienna, Austria, September 20-24, 2009, 4.6.2.
  • Future high-bandwidth demand services and network trend
    K. Sato
    OECC 2009 (14th Optoelectronics and Communications Conference), Workshop, Hong Kong, July 13, 2009.
  • The Future optical network
    K. Sato
    IEEE Photonics Society Summer Topicals 2009, Newport Beach, California, July 20-22, 2009.
  • Future directions of optical networking technology development -Optical fast circuit switching and multilevel optical routing
    K. Sato
    Photonics in Switching 2009, Pisa, Italy, September 16-19, 2009, WeII1-2.
  • Hierarchical optical path network design algorithm that can best utilize WSS/WBSS based cross-connects
    L. H. Chau, H. Hasegawa and K. Sato
    Photonics in Switching 2009, Pisa, Italy, September 16-19, 2009, ThII2-3.
  • Low loss and cost-effective hierarchical optical path cross-connect switch architecture based on WSS/WBSS
    S. Mitsui, H. Hasegawa and K. Sato
    Photonics in Switching 2009, Pisa, Italy, September 16-19, 2009, FrII2-3.
  • Hierarchical optical cross-connect architecture that implements colorless waveband Add/Drop ratio restriction utilizing a novel wavelength multi/demultiplexers
    R. Hirako, K. Ishii, H. Hasegawa, K. Sato, and O. Moriwaki
    Photonics in Switching 2009, Pisa, Italy, September 16-19, 2009, FrII2-2.
  • Impact of path granularity and operation interval on dynamic path network control
    H. Ito, H. Hasegawa, and K. Sato
    ACP 2009 (Asia Communications and Photonics Conference and Exhibition 2009), November 2-6, 2009, Shanghai, China.
  • Evaluations on Physical and Optical Path Level Hierarchical Networks to Implement Optical Fast Circuit Switching
    T. Ogawa, Y. Yamada, H. Hasegawa, K. Sato
    ACP 2009 (Asia Communications and Photonics Conference and Exhibition 2009), November 2-6, 2009, Shanghai, China.
  • Impact of waveband capacity on protected hierarchical optical path networks
    Y. Yamada, H. Hasegawa, and K. Sato
    ACP 2009 (Asia Communications and Photonics Conference and Exhibition 2009), November 2-6, 2009, Shanghai, China.
  • A dynamic routing algorithm for multi-domain photonic networks using averaged link load information
    K. Shimada, S. Araki, H. Hasegawa, and K. Sato
    ACP 2009 (Asia Communications and Photonics Conference and Exhibition 2009), November 2-6, 2009, Shanghai, China.

2008

  • 8x8 wavelength router with transmission channel reallocation capability
    O. Moriwaki, K. Suzuki, H. Takahashi, K. Sato, and S. Kakehashi
    OFC 2008, OWC5, San Diego, February 2008.
  • Interleaved waveband MUX/DEMUX developed on single arrayed-waveguide grating
    S. Kakehashi, H. Hasegawa, K. Sato, O. Moriwaki
    OFC 2008, OThE1, San Diego, February 2008.
  • Cost comparisons for hierarchical and single-layer optical path networks considering waveband and wavelength path protection
    Y. Yamada, H. Hasegawa, K. Sato
    OFC 2008, OThI4, San Diego, February 2008.
  • Key enabling photonic network technologies for future networks
    K. Sato
    The 17th Wireless and Optical Communications Conference, WOOC 2008, Taichung, Taiwan, April 23-24, 2008, pp. 81-82.
  • Hierarchical optical path cross-connect node architecture using WSS/WBSS
    S. Mitsui, H. Hasegawa and K. Sato
    Photonics Switching 2008, S-04-1, Hokkaido, Japan, August 4-7, 2008.
  • Future directions of networking technologies
    K. Sato
    FISC 2008/AsiaFI (Future Internet Summer Camp 2008/First Asia Future Internet (AsiaFI) School on Architecture and Building Blocks), Jeju, Korea, August 25-29, 2008.
  • Network segmentation and design algorithm for large-scale optical path networks based on traffic distribution information
    T. Yamamoto, H. Hasegawa, and K. Sato
    ECOC 2008, We.2.B.6, Brussels, September 22-25, 2008.
  • Monolithically Integrated Waveband Selective Switch Using Cyclic AWGs
    K. Ishii, H. Hasegawa, K. Sato Kamei, H. Takahashi, and M. Okuno
    ECOC 2008, Mo.4.C.5, Brussels, September 22-25, 2008.
  • Optical Multicast Tree Construction Algorithm Considering SNR Constraint and 3R Regeneration
    Y. Morita, H. Hasegawa, K. Sato, Y. Sone, K. Yamada, M. Jinno
    ECOC 2008, We.3.A.4, Brussels, September 22-25, 2008.
  • The future of optical networks
    K. Sato
    ECOC 2008, We.3.A.1, Brussels, September 22-25, 2008.
  • Optical Path Dynamic Routing Algorithm based on Traffic Prediction
    K. Obara, H. Hasegawa, K. Sato
    APOC 2008 (Asia-Pacific Optical Communications), SPIE Conference 7137, Session 9a, Hangzhou, China, October 26-30, 2008.
  • Evaluation of network parameter dependencies of hierarchical optical path network cost considering waveband protection
    Y. Yamada, H. Hasegawa and K. Sato
    COIN 2008, Akihabara, Tokyo, October 14-16, 2008.
  • Hierarchical optical path network design algorithm considering waveband add/drop ratio constraint
    L. H. Chau, H. Hasegawa and K. Sato
    COIN 2008, Akihabara, Tokyo, October 14-16, 2008.
  • Performance evaluation of dynamic network design for provisioning of broadband connection services
    M. Nakagawa, H. Hasegawa and K. Sato
    COIN 2008, Akihabara, Tokyo, October 14-16, 2008.
  • Advances in photonic networking technology and its impact on future networks
    K. Sato
    APOC 2008 (Asia-Pacific Optical Communications), SPIE Conference 7137, Session 8a, Hangzhou, China, October 26-30, 2008.

2007

  • Waveband MUX/DEMUX Using Concatenated AWGs -Formulation of Waveguide Connection and Fabrication
    S. Kakehashi, H. Hasegawa, K. Sato, O. Moriwaki, S. Kamei, Y. Jinnouchi, and M. Okuno
    OFC 2007, JThA94, Anaheim, March 25-29, 2007.
  • Quasi-Dynamic Network Design Considering Different Service Holding / Contract Terms
    K. Kanie, H. Hasegawa, and Ken-ichi Sato
    Proc. on OFC2007, no.JThA65, Mar. 2007.
  • Fast Generation of Orthogonal Periodic Polynomials and Its Application to Smooth Approximation of the Internet Traffic
    H. Hasegawa, N. Matsusue, and K. Sato
    to be presented at OECC/IOOC 2007, Yokohama, Japan, Jul. 13.
  • Loop-back AWG Router with Non-uniform Number of Transmission Paths
    O. Moriwaki, K. Suzuki, H. Takahashi, Y. Sakai , K. Sato, and S. Kakehashi
    OFC 2007, JThA24, Anaheim, March 25-29, 2007.
  • Recent Developments in and Challenges of Photonic Networking Technologies
    K. Sato
    Plenary of COIN-ACOFT International Conference 2007, Melbourne, Australia, June 24-27, 2007.
  • Recent advances and challenges of multi-granular optical path networks
    K. Sato
    2007 Japan-Italy Bilateral Workshop on Photonics for Communication, July 5-6, Osaka, Japan.
  • Multi-granular optical path networking technologies
    K. Sato
    Photonics in Switching 2007, WA4.2, San Francisto, August 19-22, 2007.
  • Simple node architectures for connection of two ROADM rings using hierarchical optical path routing
    K. Ishii, H. Hasegawa, and K. Sato
    Photonics in Switching 2007, TuA2.3, San Francisto, August 19-22, 2007.
  • Waveband selective switch using concatenated AWGs
    S. Kakehashi, H. Hasegawa, K. Sato, O. Moriwaki, and M. Okuno
    ECOC 2007, Mo.2.5.3, Berlin, Germany, September 16-29, 2007.
  • Hierarchical optical path network design considering waveband protection
    Y. Yamada, H. Hasegawa, K. Sato
    ECOC 2007, Tu.7.5.5, Berlin, Germany, September 16-29, 2007.
  • Simple node architectures for connection of ROADM rings
    K. Ishii, H. Hasegawa, and K. Sato
    ECOC 2007, Th.2.5.3, Berlin, Germany, September 16-29, 2007.
  • Suppression of Boundary Effect and Introduction of Scale Correlation for Wavelet based Traffic Prediction
    N. Matsusue, H. Hasegawa and K Sato
    IEEE International Workshop on Multimedia Signal Processing, MMSP 2007, Crete, Greece, October 1-3, 2007, pp. 438-440.
  • An RWA algorithm for OBS networks based on iterative local optimization of total blocking probability
    T. Yoshikawa, H. Nagashima, H. Hasegawa, and K. Sato
    APOC 2007, Conference 6783-60, Wuhan, China, November 1-5, 2007.
  • Prospects and challenges of hierarchical optical networks
    K. Sato
    APOC 2007, Conference 6783-01, Wuhan, China, November 1-5, 2007.

2006

  • Design of MPLS/GMPLS multilayer network considering protection and restoration
    W. Imajuku, T. Ohara, R. Takeshima, T. Uyematsu, and K. Sato
    OFC 2006, OWQ6, Anaheim, March 5-10, 2006.
  • Optical switch architectures for hierarchical optical path networks
    S. Kakehashi, H. Hasegawa, and K. Sato
    Proc. SPIE, vol. 6388, Optics East 2006, Boston, October 2-4, 2006, pp. 638809-1 - 638809-9.
  • Waveband MUX/DEMUX Using Concatenated Arrayed-Waveguide Gratings
    S. Kakehashi, H. Hasegawa, K. Sato, and O. Moriwaki
    ECOC 2006, Cannes, September 24-28, 2006, We3.P.56.
  • An Efficient Hierarchical Optical Path Network Design Algorithm based on a Traffic Demand Expression in a Cartesian Product Space
    I. Yagyu, H. Hasegawa, and K. Sato
    ECOC 2006, Cannes, September 24-28, 2006, Tu.3.6.6.
  • Advances and challenges of IP plus photonic networks
    K. Sato
    Optics East 2006(ITCom2006), Boston, October 2-4, 2006.
  • Recent development and challenges of photonic networking technologies
    K. Sato
    Asia-Pacific Optical Communications Conference, APOC2006, Gwangju, Korea, September 3-7, 2006.
  • Development of hierarchical optical path network
    K. Sato
    KAIST International Workshop on "Harnessing Photonics for Future Applications," Seoul, Korea, September 2, 2006.
  • Toward 100 Tera b/s router
    K. Sato
    Optical Network Testbeds Workshop 3 (ONT3), Tokyo, September 7-8, 2006.
  • Advances and challenges of photonic networking technologies
    K. Sato
    International Conference on Photonics in Switching 2006, Herakleion (Crete), Greece, October 16-18, 2006.
  • An Edge-Preserving Super-Precision for Simultaneous Enhancement of Spacial and Grayscale Resolutions
    H. Hasegawa, T. Ohtsuka, I. Yamada, K. Sakaniwa
    Proc of 2006 IEEE International Workshop on Multimedia Signal Processing (MMSP 2006), Victoria(B.C.), Canada, Oct. 2006.

Awards

2026

  • Yusuke IidaIEICE Tokai Section Student Research Encouragement Award
  • Kouki KidaniAPN 2026 Student Award, IEICE APN Workshop 2026
  • Shunya ShimoiIEEE Nagoya Section Conference Presentation Award
  • Koki ManoIEEE Nagoya Section Conference Presentation Award
  • Koki KagawaPN Young Researcher’s Award, IEICE Technical Committee on Photonic Network
  • Shunya ShimoiPN Student Encouragement Award, IEICE Technical Committee on Photonic Network
  • Koki ManoPresentation Award, IEICE Technical Committee on Photonic Network
  • Yusuke IidaBest Presentation Award, Joint Graduation Research Presentation, Department of Electrical, Electronic and Information Engineering, Nagoya University
  • Taisei SekizukaExcellence Award, Interim Presentation of Master’s Theses, Electrical Engineering Departments, Graduate School of Engineering, Nagoya University

2025

  • Hayato YuasaYoung Researcher’s Encouragement Award, IEICE Communications Society
  • Taisei SekizukaBest Paper Award, OECC/PSC 2025 (30th OptoElectronics and Communications Conference / International Conference on Photonics in Switching and Computing)
  • Shunya ShimoiIEICE Tokai Section Student Research Encouragement Award
  • Taisei SekizukaIEICE Tokai Section Student Research Encouragement Award
  • Taisei SekizukaBest Graduation Research Presentation Award, IEICE Tokai Section Graduation Research Presentation
  • Taisei SekizukaIEEE Nagoya Section Conference Presentation Award
  • Hayato YuasaIEEE Nagoya Section Conference Presentation Award
  • Shunya ShimoiIEICE Tokai Section Academic Excellence Award, FY2024
  • Koki KagawaIEEE Nagoya Section Excellent Student Award for Master's Program
  • Takuma KunoIEEE Nagoya Section Excellent Student Award for Doctoral Program
  • Hayato YuasaPN Young Researcher’s Encouragement Award, IEICE Technical Committee on Photonic Network
  • Ikuto InouePresentation Award, Student Workshop of the IEICE Technical Committee on Photonic Network
  • Taisei SekizukaBest Presentation Award, Joint Graduation Research Presentation, Department of Electrical, Electronic and Information Engineering, Nagoya University

2024

  • Kazato SatakeIEICE Tokai Section Student Research Encouragement Award
  • Hayato YuasaIEICE Tokai Section Student Research Encouragement Award
  • Ryuta ShirakiThe 6th Nagoya University Okamoto Young Researcher Award
  • Takuma KunoTelecom System Technology Student Award, Telecommunications Advancement Foundation
  • Taisei SekizukaPresentation Award, Student Workshop of the IEICE Technical Committee on Photonic Network
  • Takuma KunoPN Student Encouragement Award, IEICE Technical Committee on Photonic Network
  • Kenji CruzadoExcellence Award, the 10th JPN Design Contest, IEICE Technical Committee on Photonic Network
  • Hayato YuasaBest Presentation Award, Joint Graduation Research Presentation, Department of Electrical, Electronic and Information Engineering, Nagoya University
  • Kazato SatakeBest Student Paper Award, SPIE Photonics West 2024

2023

  • Takuro OchiaiExcellent Poster Presentation Award, IEICE RISING
  • Takuma KunoBest Student Paper Award, PSC 2023 (International Conference on Photonics in Switching and Computing)
  • Yoshiaki IshikawaStudent Paper Award, Optica Advanced Photonics Congress 2023
  • Takuro OchiaiStudent Paper Award, Optica Advanced Photonics Congress 2023
  • Kenji CruzadoIEICE Tokai Section Student Research Encouragement Award
  • Reiji HiguchiIEICE Tokai Section Student Research Encouragement Award
  • Ryuta ShirakiIEEE Nagoya Section Excellent Student Award for Doctoral Program
  • Ryuji MunakataIEEE Nagoya Section Excellent Student Award for Master's Program
  • Daisuke SaitoExcellent Presentation Award, FY2022 Interim Presentation of Master’s Theses, Electrical Engineering Departments
  • Takuma Kunowith Takumi Mitsuya, Yojiro Mori, Hiroshi Hasegawa and Ken-ichi Sato: PN Research Award, IEICE Technical Committee on Photonic Network
  • Takeshi MatsuoExcellence Award, the 9th JPN Design Contest, IEICE Technical Committee on Photonic Network
  • Ryuji MunakataPN Student Encouragement Award, IEICE Technical Committee on Photonic Network
  • Takumi MitsuyaPN Student Encouragement Award, IEICE Technical Committee on Photonic Network
  • Yoshiaki IshikawaExcellent Presentation Award, Student Workshop of the IEICE Technical Committee on Photonic Network
  • Reiji HiguchiPresentation Award, Student Workshop of the IEICE Technical Committee on Photonic Network

2022

  • Takuma KunoEnglish Session Award of NS Committee, IEICE Technical Committee on Network Systems
  • Ryuji MunakataBest Student Paper Award, RNDM 2022 (12th International Workshop on Resilient Networks Design and Modeling)
  • Takeshi MatsuoIEICE Tokai Section Student Research Encouragement Award
  • Takuma KunoIEEE Nagoya Section Excellent Student Award for Master's Program
  • Naoki TsuchidaIEEE Nagoya Section Conference Presentation Award
  • Ryuji MunakataExcellence Award, the 8th JPN Design Contest, IEICE Technical Committee on Photonic Network
  • Takuma KunoExcellence Award, Student Workshop of the IEICE Technical Committee on Photonic Network

2021

  • Takuma KunoHiroshi Harashima Academic Encouragement Award
  • Naoki TsuchidaIEICE Tokai Section Student Research Encouragement Award
  • Takuma KunoIEEE Nagoya Section Conference Presentation Award
  • Yang WangPN Student Encouragement Award, IEICE Technical Committee on Photonic Network
  • Takuma KunoExcellence Award, the 7th JPN Design Contest, IEICE Technical Committee on Photonic Network
  • Jun SakanoPresentation Award, the 15th PN Student Workshop, IEICE Technical Committee on Photonic Network

2020

  • Yang WangBest Student Paper Award, OECC 2020 (25th OptoElectronics and Communications Conference)
  • Takuma KunoBest Paper Award, ICP 2020 (8th IEEE International Conference on Photonics)
  • Eiji HondaIEICE Tokai Section Student Research Encouragement Award
  • Takuma KunoIEICE Tokai Section Student Research Encouragement Award
  • Takuma KunoBest Student Paper Award, ONDM 2020 (International Conference on Optical Network Design and Modeling)
  • Ryuta ShirakiIEEE Nagoya Section Conference Presentation Award
  • Ryuta ShirakiTelecom System Technology Student Award, Telecommunications Advancement Foundation
  • Ryuta ShirakiEncouragement Award, the 6th JPN Design Contest, IEICE Technical Committee on Photonic Network

2019

  • Ryuta ShirakiBest Student Oral Presentation Award, ICTON 2019 (International Conference on Transparent Optical Networks)
  • Ryuta ShirakiIEICE Tokai Section Student Research Encouragement Award
  • Eiji HondaExcellence Award, the 15th Student Workshop, IEICE Technical Committee on Photonic Network

2018

  • Mungun-Erdene GanboldBest Student Paper Award 1st Prize, OSA Advanced Photonics Congress 2018
  • Keisuke KayanoIEICE Tokai Section Student Research Encouragement Award
  • Ryota HashimotoIEICE Tokai Section Student Research Encouragement Award
  • Shuhei YamaokaIEEE Nagoya Section Conference Presentation Award
  • Hiroki NagaiOptical Communications Best Technical Paper Award, SPIE Photonics West 2018

2017

  • Yuma IsonoEnglish Section Award, IEICE General Conference
  • Shuhei YamaokaIEICE Tokai Section Student Research Encouragement Award
  • Shuhei YamakamiIEICE Tokai Section Student Research Encouragement Award
  • Yusaku ItoIEEE Nagoya Section Conference Presentation Award
  • Shuhei YamaokaExcellence Award, the 13th Student Workshop, IEICE Technical Committee on Photonic Network
  • Hiroshi SaitoExcellence Award, the 3rd JPN Design Contest, IEICE Technical Committee on Photonic Network

2016

  • Koh UedaBest Paper Award, OECC/PS 2016 (21st OptoElectronics and Communications Conference / International Conference on Photonics in Switching)
  • Masaki NiwaIEICE Tokai Section Student Research Encouragement Award
  • Tomohiro IshikawaIEICE Tokai Section Student Research Encouragement Award
  • Masaki NiwaTop Rated Systems/Networking Paper, OFC 2016
  • Kosuke SatoTop Rated Systems/Networking Paper, OFC 2016
  • Koh UedaBest Paper Award, ICP 2016 (IEEE 6th International Conference on Photonics)
  • Keisuke ItoShort Presentation Award, Student Workshop of the IEICE Technical Committee on Photonic Network
  • Keisuke ItoExcellence Award, Student Workshop of the IEICE Technical Committee on Photonic Network
  • Koh UedaIEICE Young Researcher’s Award
  • Koh UedaExcellent Paper Presentation Award, the 36th Annual Meeting of the Laser Society of Japan (2016)

2015

  • Hiroshi KawaseYoung Researcher’s Award, IEICE Technical Committee on Photonic Network
  • Koh UedaIEICE Tokai Section Student Research Encouragement Award
  • Masaki NiwaExcellent Paper Presentation Award, the 35th Annual Meeting of the Laser Society of Japan
  • Koh UedaExcellence Award, Student Workshop of the IEICE Technical Committee on Photonic Network
  • Koh UedaShort Presentation Award, Student Workshop of the IEICE Technical Committee on Photonic Network
  • Yuki TeradaYoung Researcher’s Award, IEICE Technical Committee on Photonic Network
  • Zhishu ShenYoung Researcher’s Award, IEICE Technical Committee on Photonic Network
  • Koh UedaTop-Scoring Paper, OFC 2015

2014

  • Kensuke TakahaTop-Scored Paper, OFC/NFOEC 2014

2012

  • Naoaki OsawaShort Presentation Award, the 8th Student Workshop, IEICE Technical Committee on Photonic Network
  • Yusuke HachisukaExcellence Award, the 7th Student Workshop, IEICE Technical Committee on Photonic Network
  • Tomonobu NiwaIEEE Nagoya Section Student Encouragement Award

2011

  • Zhishu ShenBest Student Paper Award, ACP 2011 (Asia Communications and Photonics Conference)
  • Toshinori BanIEICE Tokai Section Conference Presentation Award
  • Ryosuke HirakoIEICE Tokai Section Student Research Encouragement Award, FY2010
  • Yoshiyuki YamadaYoung Researcher’s Award, IEICE Technical Committee on Photonic Network
  • Kazuteru NakanoYoung Researcher’s Award, IEICE Technical Committee on Photonic Network, FY2010
  • Nagoya UniversityJGN2plus Award (Advanced and Fundamental Technology Award)

2010

  • Masahiro NakagawaSemi-finalist, Corning Outstanding Student Paper Competition, OFC/NFOEC 2010
  • Shin-ichi MitsuiSemi-finalist, Corning Outstanding Student Paper Competition, OFC/NFOEC 2010

2009

  • Yoshiyuki YamadaBest Student Presentation Award – Honorable Mention, ACP 2009
  • Kiyo IshiiIEICE Tokai Section Student Research Encouragement Award, FY2008
  • Kiyo IshiiExcellence Award, the 2nd Student Workshop, IEICE Technical Committee on Photonic Network
  • Yoshiyuki YamadaSemi-finalist, Corning Outstanding Student Paper Competition, OFC/NFOEC 2009
  • Masahiro NakagawaBest Paper Award, ONDM 2009 (13th International Conference on Optical Network Design and Modeling)

2008

  • Ken-ichi Sato and Hiroshi HasegawaIEICE Communications Society Best Paper Award (Tutorial Paper) 2008, “Prospects and challenges of multi-layer optical networks”
  • Yoshiyuki YamadaIEICE Tokai Section Student Research Encouragement Award, FY2007
  • Kiyo IshiiYoung Researcher’s Award, IEICE Technical Committee on Photonic Network

2007

  • Ken-ichi SatoIEICE Communications Society Best Paper Award (Tutorial Paper) 2007, “Recent Developments in and Challenges of Photonic Networking Technologies”
  • Shoji KakehashiIEICE Tokai Section Student Research Encouragement Award, FY2006
  • Yoshiyuki YamadaIEEJ Tokai Section Director’s Award