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Research paper : Demonstration of optical communication network for ultra high-definition image transmission (J. Kurumida et al.)−116−Synthesiology - English edition Vol.4 No.2 (2011) Term 3.Term 4.Term 5.Term 6.Term 7.Term 8.Term 9.Transponder: optical transmitting/receiving equipment that communicates at an arbitrary wavelength, by storing the client signal and converting it into frame format (such as OTN) appropriate for the backbone transmission networks.Transponder aggregator: a device that resolves the ROADM’s issue of the limitation of wavelength and path in the optical route setting, and provides the degree of freedom in reconfiguring the optical route between the transmission line and the optical transmitting/receiving device (transponder). It is composed of the waveguide with wavelength selectivity and an optical matrix switch, and it enables the optical route setting where the arbitrary transponder connects to an arbitrary optical fiber transmission route at an arbitrary wavelength.C-band, L-band: the wavelength range used in optical communication. Conventional (C) band has the wavelength range of 1530-1565 nm, while long (L) band has the range 1565-1625 nm.Erbium-doped optical fiber amplifier: a device that amplifies the optical signal directly in the fiber without the electrical signal conversion, utilizing the principle where the optical signal of a certain range is amplified when the excitation light of a certain wavelength is applied to a fiber doped with rare earth element erbium.Topology: a term that indicates the position and connection. In general, it indicates the connection format of the computer network. Star-type and ring-type network topology are most commonly used.Open systems interconnection (OSI): the standardization and organization where the communication protocol is broken down into the seven-layer structure. It is known as the OSI reference model.Media converter: a device that connects the different transmission media and converts the signals mutually. The most common one is the device that converts the LAN cable (copper wire) to optical fiber.ReferencesMinistry of Internal Affairs and Communications, 2010 White Paper on Information and Communications in Japan, (White paper), (2010).S. Namiki, T. Kurosu, K. Tanizawa, J. Kurumida, T. Hasama, H. Ishikawa, T. Nakatogawa, M. Nakamura and K. Oyamada: Super HD video transmission and extremely green optical networks for future, IEEE Journal of Selected Topics in Quantum Electronics, 17 (2), 446-457 (2011).K. Yamada, Y. Tsukishima, K. Matsuda, M. Jinno, Y. Tanimura, T. Kudoh, A. Takefusa, R. Takano and T. Shimizu: Joint storage-network resource management for super high-definition video delivery service, Optical Fiber Communication (OFC) 2011, Conference on, JWA1, (2011).H. Harai: Report of proof-of-concept experimental and live demonstration of optical packet & circuit integrated network [1][2][3][4]over JGN2plus optical-fiber testbed, IEICE technical report, 110, 7-12 (2010).NICT, Advanced Testbed Network for R&D, http://www.jgn.nict.go.jp/.Y. Shoji, K. Kintaka, S. Suda, H. Kawashima, T. Hasama and H. Ishikawa: Low-crosstalk 2 x 2 thermo-optic switch with silicon wire waveguides, Optics Express, 18, 9071-9075 (2010).S. Sekiguchi, T. Kurahashi, K. Kawaguchi and K. Morito: Current-type silicon-based optical switch with silicon germanium waveguide, IEEE Photonics Society 23rd Annual Meeting, WW3 (2010).M. Sakauchi, I. Nishioka, S. Nakamura, T. Chu and Y. Urino: Demonstration of fast optical protection in ROADM system with one-chip color/direction- independent add/drop multiplexer employing silicon photonic circuit, Optical Fiber Communication (OFC) 2009, Conference on, JThA51 (2009).Y. Oikawa, Y. Horiuchi, Y. Tanaka, M. Shiga, N. Shiga and H. Nagaeda: Super-fast AGC-EDFA for the burst-mode systems without gain excursion in 20-ns and 21-dB ramped input, 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference, 1-3 (2008).S. Petit, T. Kurosu, S. Namiki, M. Takahashi and T. Yagi: Truly arbitrary wavelength conversion by cascaded four-wave mixing in low dispersion slope sbs suppressed highly nonlinear fibers, 2010 IEEE Photonics Society Winter Topicals Meeting Series, 115-116 (2010).S.Namiki: Wide-band and -range tunable dispersion compensation through parametric wavelength conversion and dispersive optical fibers, Journal of Lightwave Technology, 26, 28-35 (2008).M. Takahashi, R. Sugizaki, J.Hiroishi,M.Tadakuma,Y. Taniguchi and T.Yagi: Low-loss and low-dispersion-slope highly nonlinear fibers, Journal of Lightwave Technology, 23, 3615-3624 (2005).K. Tanizawa, J. Kurumida, H. Ishida, Y. Oikawa, N. Shiga, M. Takahashi, T. Yagi and S. Namiki: Microsecond switching of parametric tunable dispersion compensator, Optics Letters, 35, 3039-3041 (2010).T. Nakatogawa,S. Okabe,M. Nakamura,K. Oyamada,F. Suginoshita, T. Ikeda and K. Shogen: Wireless and fibre-optic live contribution link for uncompressed super hi-vision signals, The Best of IET and IBC, IET Journals, 2, 31-36 (2010).[5][6][7][8][9][10][11][12][13][14]AuthorsJunya KurumidaResearcher, Optical Signal Processing System Research Team, Network Photonics Research Center (NPRC), AIST. He received the master’s degree from the Graduate School of Engineering, Osaka Electro-Communication University in 1998 and the doctorate from the Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology. Doctor (Engineering). He worked at the Fujitsu Ltd., Photonics Research Institute of AIST, and University of California, Davis. He is with NPRC since 2009,and engages in R&D for device and system in the optical fiber communication technology field. Cooperated with Shu Namiki to oversee the entire demo experiment and managed the operation and wrote all chapters of this paper.

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