S. Kakehashi, H. Hasegawa, K. Sato, O. Moriwaki, and S. Kamei, "Analysis and development of fixed and variable waveband MUX/DEMUX utilizing AWG routing functions," IEEE JLT, vol. 27, No. 1, January 2009, pp. 30-40.
K. Sato and H. Hasegawa, "Optical networking technologies that will create future bandwidth abundant networks," Journal of Optical Communications and Networking, Special Issue on Optical Networks for Future Internet, vol. 1, No. 2, July 2009, pp. A81-A93.
Y. Yamada, H. Hasegawa, and K. Sato, "Hierarchical optical path network design algorithm considering waveband protection," Journal of Lightwave Technology, vol. 27, No. 24, Dec. 2009, pp. 5736-5748.
International Conferences
M. Nakagawa, H. Hasegawa, K. Sato, R. Sugiyama, T. Takeda, E. Oki, and K. Shiomoto, "New dynamic network design and provisioning algorithms for broadband connection services considering fairness," ONDM 2009 (13th Conference on Optical Network Design and Modeling), Braunschweig, Germany, February 18-20, 2009, Paper #1569164809.
Y. Yamada, H. Hasegawa and K. Sato, "Survivable hierarchical optical path networks employing waveband and wavelength path protection," OFC 2009, OWY3, San Diego, March 22-26, 2009.
K. Ishii, H. Hasegawa, K. Sato, M. Okuno, S. Kamei, and H. Takahashi, "An Ultra-compact Waveband Cross-connect Switch Module to Create Cost-effective Multi-degree Reconfigurable Optical Node," ECOC 2009 -35th European Conference on Optical Communication, Vienna, Austria, September 20-24, 2009, 4.2.2.
K. Ishii, O. Moriwaki, H. Hasegawa, K. Sato, Y. Jinnouchi, M. Okuno, and H. Takahashi, "Efficient ROADM-ring Connecting Node Switch Architecture that Utilizes Waveband Routing and its Realization with PLC Technologies," ECOC 2009 (35th European Conference on Optical Communication), Vienna, Austria, September 20-24, 2009, 5.3.1.
K. Ishii, H. Hasegawa, K. Sato, "Route and Wavelength/Waveband Assignment for Creation of Compact Hierarchical Optical Cross-Connect for Multi-Ring Connection," ECOC 2009 - 35th European Conference and Exhibition on Optical Communication, Vienna, Austria, September 20-24, 2009, 4.6.2.
K. Sato, "Future high-bandwidth demand services and network trend," OECC 2009 (14th Optoelectronics and Communications Conference), Workshop, Hong Kong, July 13, 2009.
K. Sato, "The Future optical network," IEEE Photonics Society Summer Topicals 2009, Newport Beach, California, July 20-22, 2009.
K. Sato, "Future directions of optical networking technology development -Optical fast circuit switching and multilevel optical routing," Photonics in Switching 2009, Pisa, Italy, September 16-19, 2009, WeII1-2.
L. H. Chau, H. Hasegawa and K. Sato, "Hierarchical optical path network design algorithm that can best utilize WSS/WBSS based cross-connects," Photonics in Switching 2009, Pisa, Italy, September 16-19, 2009, ThII2-3.
S. Mitsui, H. Hasegawa and K. Sato, "Low loss and cost-effective hierarchical optical path cross-connect switch architecture based on WSS/WBSS," Photonics in Switching 2009, Pisa, Italy, September 16-19, 2009, FrII2-3.
R. Hirako, K. Ishii, H. Hasegawa, K. Sato, and O. Moriwaki, "Hierarchical optical cross-connect architecture that implements colorless waveband Add/Drop ratio restriction utilizing a novel wavelength multi/demultiplexers," Photonics in Switching 2009, Pisa, Italy, September 16-19, 2009, FrII2-2.
H. Ito, H. Hasegawa, and K. Sato, "Impact of path granularity and operation interval on dynamic path network control," ACP 2009 (Asia Communications and Photonics Conference and Exhibition 2009), November 2-6, 2009, Shanghai, China.
T. Ogawa, Y. Yamada, H. Hasegawa, K. Sato, "Evaluations on Physical and Optical Path Level Hierarchical Networks to Implement Optical Fast Circuit Switching," ACP 2009 (Asia Communications and Photonics Conference and Exhibition 2009), November 2-6, 2009, Shanghai, China.
Y. Yamada, H. Hasegawa, and K. Sato, "Impact of waveband capacity on protected hierarchical optical path networks," ACP 2009 (Asia Communications and Photonics Conference and Exhibition 2009), November 2-6, 2009, Shanghai, China.
K. Shimada, S. Araki, H. Hasegawa, and K. Sato, "A dynamic routing algorithm for multi-domain photonic networks using averaged link load information," ACP 2009 (Asia Communications and Photonics Conference and Exhibition 2009), November 2-6, 2009, Shanghai, China.
L. H. Chau, H. Hasegawa, K. Sato, "Cost evaluation of hierarchical optical path networks applying waveband add/drop ratio constraint to each waveband," IEICE General Conference 2009, B-12-1, March 17-20, 2009, Matsuyama, Japan.
H-C. Le, H. Hasegawa, and K. Sato, " Hierarchical Optical Path Network Design Considering Waveband Add/Drop Ratio Restriction and Network Cost Analysis on Different Network Parameters," IEICE Technical Report, vol. 108, No. 423, OCS2008-109, pp. 13-18, February 2009.