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Hideyuki Sotobayashi (Dr. Eng.)


Biography
Hideyuki Sotobayashi received the B.E. degree in electronic engineering in 1992 and the M.E. and Dr.Eng. degrees in electrical engineering from the University of Tokyo, Tokyo, Japan, in 1994 and 1997, respectively. In 1997, he joined Communications Research Laboratory (CRL), Ministry of Posts and Telecommunications (MPT), Tokyo, Japan, where he has been engaged in research on photonic networks, optical communications, photonic processing, and nonlinear optics. CRL was reorganized as "National Institute of Information and Communications Technology (NICT)" on April 1st, 2004. In 2008, he joined the Aoyama Gakuin University as an Associate Professor.

Dr. Sotobayashi is a senior member of the Institute of Electrical and Electronics Engineers (IEEE) and members of the Optical Society of America (OSA), the Institute of Electronics and Information Communication Engineers of Japan (IEICE), and the Japan Society of Applied Physics (JSAP).

Since 2002 until 2005, he was a Visiting Scientist of Massachusetts Institute of Technology.
Since 2005, he has been a Research Affiliate of Massachusetts Institute of Technology.

Index Terms
Photonics, Optics, Photonic Network, Optical communication,
Optical time division multiplexing (TDM), Wavelength division multiplexing (WDM), Optical code division multiplexing (CDM), Subcarrier multiplexing (SCM),
Photonic processing, Nonlinear optics, Ultrafast phenomena,
Photonic link, Photonic node, Photonic access,
Optical phase conjugation (OPC), Wavelength conversion, Optical time gate, Supercontinuum (SC), Photonic label switching router (LSR), Photonic routing, Photonic packet switching, Label swapping
Optical fiber, Semiconductor optical amplifier (SOA), Four wave mixing (FWM), Photonic gateway


Journals

  • N. Yamamoto, K. Akahane, T. Kawanishi, H. Sotobayashi, Y. Yoshioka, and H. Takai, "Characterization of wavelength tunable quantum dot external cavity laser (QD-ECL) for 1.3-μm waveband coherent light sources," to be published in Jpn. J. Appl. Phys.
  • N. Yamamoto, K. Akahane, T. Kawanishi, R. Katouf, H. Sotobayashi, Y. Yoshioka, and H. Takai, "1.3-μm wavelength-tunable quantum-dot optical frequency comb generator integrated with absorptive optical attenuator," to be published in physica status solidi.
  • N. Yamamoto, K. Akahane, T. Kawanishi, Y. Omigawa, H. Sotobayashi, Y. Yoshioka, and H. Takai, "Narrow-line-width 1.31-μm wavelength tunable quantum dot laser using sandwiched sub-nano separator growth technique," to be published in OSA Optics Express.
  • N. Yamamoto, H. Fujioka, D. Murakami, K. Akahane, T. Kawanishi, H. Sotobayashi, and H. Takai, "Developing a Half-Cladding Semiconductor Photonic Device Structure for Surface Transmission of Light Waves," Jpn. J. Appl. Phys. vol. 50, pp.04DG04-1-4, 2011.
  • Y. Omigawa, Y. Kinoshita, N. Yamamoto, A. Kanno, K. Akahane, T. Kawanishi, and H. Sotobayashi, "Photonic crystal fiber based ultra-broadband transmission system for waveband division multiplexing," Proc. SPIE 8073, 80732T, 2011.
  • N. Yamamoto, K. Akahane, T. Kawanishi, H. Sotobayashi, H. Fujioka, and H. Takai, "Broadband light source using modulated quantum dot structures with sandwiched sub-nano separator (SSNS) technique," physica status solidi (c), vol. 8, no. 2, pp. 328-330, 2011.
  • G. S. Qin, T. Sakamoto, N. Yamamoto, T. Kawanishi, H. Sotobayashi, T. Suzuki, and Y. Ohishi, "Fine Control of Optical Pulse Width via Doublet Gain Lines, " Laser Physics, vol. 21, no. 1, pp. 158-162, 2011.
  • N. Yamamoto, K. Akahane, T. Kawanishi, and H. Sotobayashi, "Nano-crystalline Sb-based compound semiconductor formed on silicon," J. Crystal Growth, vol. 323, no. 1, pp.431-433, 2011.
  • N. Yamamoto, Y. Omigawa, Y. Kinoshita, A. Kanno, K. Akahanea, T. Kawanishi, and H. Sotobayashi, "Development of Broadband Optical Frequency Resource over 8.4 THz in 1.0-um Waveband for Photonic Transport Systems," Proc. of SPIE, vol. 7958, pp. 79580F-1-9, 2011.
  • A. Kanno, S. Honda, R. Yamanaka, H. Sotobayashi, and T. Kawanishi, "Ultrafast and broadband frequency chirp signal generation using a high-extinction-ratio optical modulator," Optics Letters, vol. 35, no. 24, pp. 4160-4162, 2010.
  • N. Yamamoto, K. Akahane, T. Kawanishi, R. Katouf, and H. Sotobayashi,"Quantum Dot Optical Frequency Comb Laser with Mode-Selection Technique for 1-um Waveband Photonic Transport System," Jpn. J. Appl. Phys. vol. 49, pp. 04DG03-1-04DG03-4, 2010.
  • N. Yamamoto, Y. Omigawa, K. Akahane, T. Kawanishi, and H. Sotobayashi, "1-μm waveband and C-band, 10-Gbps Error Free Operation of Ultrabroadband Photonic Transport System with holey fiber," Proc. of SPIE, vol. 7621, pp.76210N-1-8, 2010.
  • N. Yamamoto, Y. Omigawa, K. Akahane, T. Kawanishi, H. Sotobayashi, "Simultaneous 3 × 10 Gbps optical data transmission in 1-μm, C-, and L-wavebands over a single holey fiber using an ultra-broadband photonic transport system," Optics Express, vol.18, no.5, pp.4695-4700, 2010.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, and I. Hosako, "Broadband wavelength-tunable ultrashort pulse source using a Mach-Zehnder modulator and dispersion-flattened dispersion-decreasing fiber," Opt. Lett., vol. 34, no. 15, pp. 2297-2299, 2009.
  • G. Qin, T. Sakamoto, N. Yamamoto, T. Kawanishi, H. Sotobayashi, T. Suzuki, and Y. Ohishi, "Tunable all-optical pulse compression and stretching via doublet Brillouin gain lines in an optical fiber," OSA Opt. Lett., vol. 34, no. 8, pp.1192-1194, 2009.
  • R. Katouf, N. Yamamoto, K. Akahane, T. Kawanishi, and H. Sotobayashi, "1-μm- band transmission by use of a wavelength tunable quantum-dot laser over a hole-assisted fiber," Proc. SPIE 7234, pp. 72340G-1-72340G-10, 2009.
  • N. Yamamoto and H. Sotobayashi, "All-band photonic transport system and its device technologies (invited)," Proc. SPIE 7235, pp. 72350C-1-72350C-11, 2009.
  • R. Katouf, N. Yamamoto, A. Kanno, N. Sekine, K. Akahane, H. Sotobayashi, T. Isu, and M. Tsuchiya, "Ultrahigh Relative Refractive Index Contrast GaAs Nanowire Waveguides," App. Phy. Exp. vol. 1, no. 12, pp. 122101-1-3, 2008.
  • N. Yamamoto, H. Sotobayashi, K. Akahane, M. Tsuchiya, K. Takashima, and H. Yokoyama, "10-Gbps, 1-μm waveband photonic transmission with a harmonically mode-locked semiconductor laser," Optics Express, vol. 16, no. 24, pp. 19836-19843, 2008.
  • G. Qin, H. Sotobayashi, M. Tsuchiya, A. Mori, T. Suzuki, Y. Ohishi, "Stimulated Brillouin scattering in a single mode tellurite fiber for amplification, lasing and slow light generation," J. Lightwave Tech., vol. 26, no. 5, pp. 492-498, 2008.
  • G. Qin, H. Sotobayashi, M. Tsuchiya, A. Mori, Y. Ohishi, "Stimulated Brillouin amplification in a Tellurite fiber as a potential system for slow light generation," J. J. App. Phy., vol. 46, No. 34, 2007.
  • T. Isu, J. Inoue, K. Akahane, H. Sotobayashi, and M. Tsuchiya, "Nonlinear absorption of highly stacked InAs quantum dot layers on an InP(311) substrate (invited)," Proc. SPIE, vol. 6393, pp. 639309-1-9, 2006.
  • H. Sotobayashi, "Supercontinuum generation based lightwave management applied to multiplexing format conversion," Proc. SPIE, vol. 6187, 61870L-1-8, 2006.
  • J. T. Gopinath, H. M. Shen, H. Sotobayashi, E. P. Ippen, T. Hasegawa, T. Nagashima, and N. Sugimoto, " Highly nonlinear bismuth-oxide fiber for supercontinuum generation and femtosecond pulse compression," IEEE/OSA J. Lightwave Technol., vol. 23, no. 11, pp. 3591-3596, 2005.
  • P. T. Rakich, H. Sotobayashi, J. T. Gopinath, J. W. Sickler, C. W. Wong, S. G. Johnson, M. Qi, E. Lidorikis, H. I. Smith, J. D. Joannopoulos, and E. P. Ippen, "Broadband optical studies of 1-D and 3-D photonic crystals (invited)," Proc. SPIE Int. Soc. Opt. Eng., vol. 6017, pp. 6011702 1-6, 2005.
  • H. Sotobayashi, J. T. Gopinath, H. M. Shen, J. W. Sickler, P. T. Rakich, and E. P. Ippen, "Supercontinuum generation and Broadband fiber lasers using bismuth-oxide-based erbium-doped fiber amplifiers (invited)," Proc. SPIE Int. Soc. Opt. Eng., vol. 6014, pp. 60140T 1-8, 2005.
  • Y. Awaji, H. Sotobayashi, and F. Kubota, "Transmission of 80 gb/s * 6 WDM over 100 km using linear optical amplifiers," IEEE Photon. Technol. lett., vol.17, no. 3, pp. 699-701, 2005.
  • P. T. Rakich, H. Sotobayashi, J. T. Gopinath, S. G. Johnson, J. W. Sickler, C. W. Wong, J. D. Joannopoulos, and E. P. Ippen, "Nano-scale photonic crystal microcavity characterization with an all-fiber based 1.2-2.0 μm supercontinuum," OSA Optics Express, vol. 13, no. 3, pp. 821-825, 2005.
  • J. T. Gopinath, H. M. Shen, H. Sotobayashi, E. P. Ippen, T. Hasegawa, T. Nagashima, and N. Sugimoto, "Highly nonlinear bismuth-oxide fiber for smooth supercontinuum generation at 1.5 μm," OSA Optics Express, vol. 12, no. 23, pp. 5697-5702, 2004.
  • Y. Takushima, H. Sotobayashi, M. E. Grein, E. P. Ippen, and H. A. Haus, "Linewidth of mode combs of passively and actively mode-locked semiconductor laser diodes (invited)," Proc. SPIE Int. Soc. Opt. Eng., vol. 5595, pp. 213-227, 2004.
  • H. Sotobayashi, J. T. Gopinath, J. W. Sickler, and E. P. Ippen, "Broadband fiber lasers using bismuth-oxide-based erbium-doped fiber amplifiers (invited)," Proc. SPIE Int. Soc. Opt. Eng., vol. 5595, pp. 16-25, 2004.
  • H. Sotobayashi, J. T. Gopinath, E. M. Koontz, L. A. Kolodziejski and E. P. Ippen, "Wavelength tunable passively mode-locked bismuth oxide-based erbium-doped fiber laser," Optics Communications, vol. 237, no. 4-6, pp. 399-403, 2004.
  • H. Sotobayashi, J. T. Gopinath, Y. Takushima, K. Hsu, and E. P. Ippen, "Broadband wavelength tunable, single frequency, and single polarization Bismuth Oxide-based Erbium-doped fiber laser," IEEE Photon. Technol. Lett., vol. 16, no. 7, pp. 1628-1630, 2004.
  • H. Sotobayashi, W. Chujo, and K. Kitayama, "Highly spectral efficient optical code division multiplexing transmission system (invited)," IEEE J. S.T. Quant. Electron., vol. 10, no. 2, pp. 250-258, 2004.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Ultrafast OTDM/WDM networks by use of photonic processing (invited)," Proc. SPIE Int. Soc. Opt. Eng., vol. 5581, pp. 556-563, 2004.
  • H. Sotobayashi, "Optical code-division multiplexing and its application to ultrafast photonic networks (invited)," Proc. SPIE Int. Soc. Opt. Eng., vol. 5581, pp. 26-39, 2004.
  • H. Sotobayashi, J. T. Gopinath, and E. P. Ippen, "Broadband bismuth-oxide-based erbium-doped fiber lasers (invited)," Proc. SPIE Int. Soc. Opt. Eng., vol. 5460, pp. 1-9, 2004.
  • H. Sotobayashi, "Optical code division multiplexing (OCDM)-based ultrafast photonic network (invited)," Proc. SPIE Int. Soc. Opt. Eng., vol. 5445, 20-25, 2004.
  • Y. Koyamada, S. Sato, S. Nakamura, H. Sotobayashi, and W. Chujo, "Simulating and designing Brillouin gain spectrum in single-mode fibers," IEEE/OSA J. Lightwave Technol., vol. 22, no. 2, pp. 631-639, 2004.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Ultrafast Hierarchical OTDM/WDM Network (invited)," J. Sys. Cyb. Inf., vol. 1, no. 6, 2004.
  • H. Sotobayashi, J.T. Gopinath, and E. P. Ippen, "23 cm long Bi2O3-based EDFA for picosecond pulse amplification with 80 nm gain bandwidth," IEE Electron. Lett., vol. 39, no. 19, pp. 1374-1375, 2003.
  • J.T. Gopinath, H. Sotobayashi, and E. P. Ippen, "Broadband amplification of picosecond pulses in a 23 cm long of Bi2O3-based Erbium-doped fiber," OSA Trends in Optics and Photonics Series (TOPS), vol. 92, pp. 50-53, 2003.
  • J. Inoue, H. Sotobayashi, W. Chujo, and H. Kawaguchi, "80 Gbit/s Conventional and Carrier-Suppressed RZ Signals Transmission over 200 km Standard Fiber by Using Mid-Span Optical Phase Conjugation (invited, OECC Awarded)," IEICE Trans. on Comm., vol. E86-B, no.5, pp.1555-1561, 2003.
  • H. Sotobayashi, "Ultra-fast photonic networks based on optical division multiplexing (invited)," Radio Science Bulletin, no. 304, pp. 34-47, 2003.
  • H. Sotobayashi, W. Chujo, and K. Kitayama, "Optical Code Division Multiplexing (OCDM) and Its Application for Peta-bit/s Photonic Network (invited)," Information Sciences, vol. 149, pp. 171-182, 2003.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Ultrafast photonic technologies for the hierarchical hybrid OTDM/WDM photonic networks (invited)," Proc. SPIE Int. Soc. Opt. Eng., vol. 5246, pp. 355-361, 2003.
  • H. Sotobayashi, "Improving Spectral Efficiency Based on Optical Code Division Multiplexing Techniques," OSA Optics & Photonics News, vol. 13, no. 12, p.37, 2002. 
  • H. Sotobayashi, W. Chujo, and K. Kitayama, "Photonic gateway: multiplexing format conversions of OCDM-to-WDM and WDM-to-OCDM at 40 Gbit/s (4 x 10 Gbit/s)," IEEE/OSA J. Lightwave Technol., vol. 20, no. 12, pp. 2002-2008, 2002.
  • T. Miyazaki, H. Sotobayashi, and W. Chujo, "Synchronous optical demultiplexing and sampling of 80-Gb/s OTDM signals by optically recovered clock using mode-locked laser diode and symmetric mach--zehnder switch," IEEE Photon. Technol. Lett., vol. 14, no. 12, pp. 1734-1736, 2002
  • H. Sotobayashi, A. Konishi, W. Chujo, and T. Ozeki, "Wavelength-band generation and transmission of 3.24-Tbit/s (81-channel WDM40-Gbit/s) carrier-suppressed return-to-zero format by use of a single supercontinuum source for frequency standardization," OSA J. Opt. Soc. Am. B, vol. 19, no. 11, pp. 2803-2809, 2002.
  • H. Sotobayashi, K. Kitayama, and W. Chujo, "Photonic gateway: TDM-to-WDM-to-TDM conversion and reconversion at 40 Gbit/s (4 channels 10 Gbits/s )," OSA J. Opt. Soc. Am. B, vol. 19, no. 11, pp. 2810-2816, 2002.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Hierarchical hybrid OTDM/WDM network based on fast optical signal processing," IEEE LEOS News Letter, vol. 16, no. 5, 2002.
  • H. Sotobayashi, "OCDM techniques for improved spectral densities," OSA Trends in Optics and Photonics Series (TOPS), vol. 77, pp. 278-283, 2002.
  • T. Makino, H. Sotobayashi, and W. Chujo, "1.5 Tbit/s (75 x 20 Gbit/s) DWDM transmission using Er3+-doped tellurite fiber amplifiers with 63 nm continuous signal band," IEE Electron. Lett., vol. 27, no. 17, pp. 1555-1557, 2002.
  • J. Inoue, H. Sotobayashi, and W. Chujo, "Sub-picosecond transform-limited 160 Gbit/s optical pulse compression using supercontinuum generation," IEICE Trans. Electron., vol. E85-C, no. 9, pp. 1718-1719, 2002.
  • H. Sotobayashi, C. Sawaguchi, Y. Koyamada, and W. Chujo, "Ultrafast walk-off free nonlinear optical loop mirror by a simplified configuration for 320 Gbit/s TDM signal demultiplexing," OSA Opt. Lett., vol. 27, no. 17, pp. 1555-1557, 2002.
  • J. Inoue, H. Sotobayashi, W. Chujo, and H. Kawaguchi, "80 Gbit/s OTDM signal transmission over 208 km standard fibre using midspan optical phase conjugation based on four-wave mixing in semiconductor optical amplifiers," IEE Electron. Lett. vol. 38, no. 15, pp. 819-821, 2002.
  • H. Sotobayashi, W. Chujo, and K. Kitayama, "Transparent virtual optical code/wavelength path network," IEEE Journal of Selected Topics in Quantum Electronics, vol. 8, no. 3, pp. 699-704, 2002.
  • H. Sotobayashi, W. Chujo and K. Kitayama, "1.6-b/s/Hz 6.4-Tb/s QPSK-OCDM/WDM (4 OCDM x 40 WDM x 40 Gb/s) transmission experiment using optical hard thresholding," IEEE Photon. Technol. Lett., vol. 14, no.4, pp. 555-557, 2002.
  • H. Sotobayashi, C. Sawaguchi, Y. Koyamada, and W. Chujo, "Walk-off free ultrafast nonlinear optical loop mirror composed of a highly-nonlinear dispersion-shifted fiber for demultiplexing 320 Gbit/s TDM signals," OSA Trends in Optics and Photonics Series (TOPS), volume on Optical Amplifiers and their Applications 2001, vol. 60, 2001.
  • K. Onohara, H. Sotobayashi, K. Kitayama, and W. Chujo, "Photonic time-slot and wavelength-grid interchange for 10-Gb/s packet switching," IEEE Photon. Technol. Lett., vol. 13, no. 10, pp.1121-1123, 2001.
  • H. Sotobayashi,W. Chujo, and T. Ozeki, "Wideband tunable wavelength conversion of 10 Gbit/s RZ signals by optical time-gating of highly chirped rectangular shape supercontinuum light source," OSA Opt. Lett., vol. 26, no. 17, pp. 1314-1316, 2001.
  • H. Sotobayashi, W. Chujo, and K. Kitayama, "1.52 Tbit/s OCDM/WDM (4 OCDM x 19 WDM x 20 Gbit/s) transmission experiment," IEE Electron. Lett., vol. 37, no. 11, pp. 700-701, 2001.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "80 Gbit/s simultaneous photonic demultiplexing based on OTDM-to-WDM conversion by four-wave mixing with a supercontinuum light source," IEE Electron. Lett., vol. 37, no. 10, pp. 640-642, 2001.
  • H. Sotobayashi, K. Kitayama, and W. Chujo, "40 Gbit/s photonic packet compression and decompression by supercontinuum generation," IEE Electron. Lett., vol. 37, no. 2, pp. 110-111, 2001.
  • K. Kitayama, N. Wada and H. Sotobayashi, "Architectural considerations for photonic IP router based upon optical code correlation," IEEE/OSA J. Lightwave Technol., vol. 18, no. 12, pp. 1834-1844, 2000.
  • H. Sotobayashi and K. Kitayama, "Optical code based label swapping for photonic routing,"IEICE Trans. Commun., pp. 2341-2347, vol. E83-B, no. 10, 2000.
  • H. Sotobayashi, K. Kitayama.and W. Chujo, "Photonic compression and decompression of 40 Gbit/s packet by supercontinuum generation, " OSA Trends in Optics and Photonics Series (TOPS), volume on Optical Amplifiers and their Applications 2000, vol. 44, 2000.
  • T. Hashimoto, H. Sotobayashi, K. Kitayama and W. Chujo, "Photonic conversion of OC-192 OTDM to-4xOC-48 WDM by supercontinuum generation," IEE Electron. Lett., vol. 36, no. 13, pp. 1133-1135, 2000.
  • N. Wada, H. Sotobayashi, and K. Kitayama, "2.5Gbit/s time-spread/wavelength-hop optical code division multiplexing using fibre bragg grating with supercontinuum light source," IEE Electron. Lett., vol. 36, no. 9, pp. 815-817, 2000.
  • K. Kitayama, H. Sotobayashi and N. Wada, "Optical code division multiplexing (OCDM) and its application to photonic networks," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. E82-A, no. 12, pp. 2616-2626, 1999.
  • H. Sotobayashi and K. Kitayama, "Cancellation of the signal fading for 60 GHz subcarrier multiplexed optical DSB signal transmission in non-dispersion-shifted fiber using midway optical phase conjugation," IEEE/OSA J. Lightwave Technol., vol. 17, no. 12, pp. 2488-2497, 1999.
  • H. Sotobayashi and K. Kitayama, "Observation of phase conservation in multi-wavelength BPSK pulse sequence generation at 10 Gbit/s using spectrum-sliced supercontinuum in an optical fiber," OSA Optics Letters., vol. 24, no. 24, pp. 1820-1822, 1999.
  • H. Sotobayashi and K. Kitayama, "All-optical code and wavelength conversion of 10 Gb/s BPSK codes by four-wave mixing in semiconductor optical amplifier for optical code division multiplexing," OSA Trends in Optics and Photonics Series (TOPS), volume on Optical Amplifiers and their Applications '99, vol. 30, pp. 271-274, 1999.
  • H. Sotobayashi and K. Kitayama, "10 Gb/s OCDM/WDM multiple access using spectrum-sliced supercontinuum BPSK pulse code sequences," OSA Trends in Optics and Photonics Series (TOPS), volume on Optical Amplifiers and their Applications '99, vol. 30, pp. 258-261, 1999.
  • H. Sotobayashi and K. Kitayama, "Broadcast-and-select OCDM/WDM network by using 10Gbit/s spectrum-sliced supercontinuum BPSK pulse code sequences," IEE Electron. Lett., vol. 35, no. 22, pp. 1966-1967, 1999.
  • A. Franzen, H. Sotobayashi, K. Kitayama, and I. Andonovic, "Demonstration of a high resolution synchroniser to facilitate payload recovery at an optical node," IEEE Photon. Technol. Lett., 1999.
  • H. Sotobayashi and K. Kitayama, "All-optical simultaneous code and wavelength conversion of 10 Gb/s BPSK codes by four-wave mixing in a semiconductor optical amplifier for optical code division multiplexings," IEE Electron. Lett., vol. 35, no. 13, pp. 1091-1093, 1999.
  • H. Sotobayashi and K. Kitayama, "Effects of asymmetric power change on BER performance using midway optical phase conjugation for fading cancellation in 60 GHz millimeter-wave optical DSB signal transmission over 100 km non-dispersion-shifted fiber," IEE Electron. Lett., vol. 35, no. 12, pp. 992-993, 1999.
  • H. Sotobayashi and K. Kitayama, "1.24 Gb/s, optical code division multiplexing transmission over 40 km dispersion-shifted fiber by bipolar coding using broadband incoherent light source," IEE Electron. Lett., vol. 35, no. 11, pp. 911-913, 1999.
  • N. Wada, H. Sotobayashi, and K. Kitayama, "Error-free 100 km transmission of 10 Gbit/s optical code division multiplexing using BPSK picoseconds-pulse code sequence with novel time-gating detection," IEE Electron. Lett., vol. 35, no. 10, pp. 833-834, 1999.
  • H.Sotobayashi and K. Kitayama, "Transfer response measurements of a programmable bipolar optical transversal filter by using the ASE noise of an EDFA," IEEE Photon. Technol. Lett., vol. 11, no. 7, pp.871-873, 1999.
  • H.Sotobayashi and K. Kitayama, "Observation of phase conservation in a pulse sequence at 10 Gbit/s in a semiconductor optical amplifier wavelength convertor by four-wave mixing," IEEE Photon. Technol. Lett., vol. 11, no. 1, pp.45-47, 1999.
  • H. Sotobayashi and K. Kitayama, "325 nm bandwidth supercontinuum generation at 10 Gbit/s using dispersion-flattened and non-decreasing normal dispersion fibre with pulse compression technique," IEE Electron. Lett., vol. 34, no. 13, pp.1336-1337, 1998.
  • I. Andonovic, H. Sotobayashi, N. Wada, and K. Kitayama, "Experimental demonstration of the (de)coding of hybrid phase and frequency codes using a pseudolocal oscillator for optical code division multiplexing," IEEE Photonics Technology Letters, vol. 10, no. 6, pp.887-890, 1998.
  • H. Sotobayashi and K. Kikuchi, "Design theory of ultra-short pulse generation from actively mode-locked fiber lasers," IEICE Transactions on Electronics, vol. E91-C, no. 2, pp.201-207, 1998.
  • T. Kato, H. Sotobayashi, J. Lee, Y. Kondo, and Y. Fujii, "Multipoint temperature sensor using fiber optic ring resonator by pulse-frequency localization," Proc. SPIE Int. Soc. Opt. Eng., vol. 2071, pp. 153-162, 1993.

International Conferences

  • K. Akahane, N. Yamamoto, M. Maeda, H. Takai, S. Nakamura, H. Yamaguchi, and H. Sotobayashi, "Synthesis of Carbon Nanotubes by Laser-Assisted Alcohol Chemical Vapor Deposition," International Workshop on Quantum Nanostructures and Nanoelectronics (QNN2011), paper P-2, Tokyo, October 2011.
  • I. Morohashi, T. Sakamoto, N. Yamamoto, H. Sotobayashi, T. Kawanishi, and I. Hosako, "Generation of broadband comb with high flexibility using Mach-Zehnder-modulator-based flat comb generator," Symposium on A Revolution in Spectroscopy by the Optical Frequency Comb, Tsukuba, September 2011.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, and I. Hosako, "Generation of 110 fs-width optical pulse using MZM-Based Flat Comb Generator and DF-DDF," the 16th Opto-Electronics and Communications Conference (OECC2011), paper 5D4_3, Taiwan, July 2011.
  • A. Kanno, N. Yamamoto, H. Sotobayashi, and T. Kawanishi, "44.8-Gbaud DP-QPSK Transmission over 3-km Endlessly Single-Mode Holey Fiber," the 16th Opto-Electronics and Communications Conference (OECC2011), 7B1_3, Taiwan, July 2011.
  • N. Yamamoto, Y. Yoshioka, K. Akahane, T. Kawanishi, R. Katouf, H. Sotobayashi, and H. Takai, "1.3 μm wavelength-tunable quantum dot optical frequency comb generator integrated with absorptive optical attenuator," the 38th International Symposium on Compound Semiconductors (ISCS 2011) and the 23rd International Conference on Indium Phosphide and Related Materials (IPRM2011), paper We-1C.2, Berlin, May 2011.
  • A. Kanno, S. Honda, R. Yamanaka, H. Sotobayashi, and T. Kawanishi, "2.56x10^17 Hz/s frequency chirp signal generation using DSB-SC optical modulation without optical filters," CELO Europe 2011, paper CI.P.8, Munich, May 2011.
  • N. Yamamoto, Y. Yoshioka, K. Akahane, T. Kawanishi, H. Sotobayashi, H. Takai, "100-GHz channel spacing and O-band quantum dot optical frequency comb generator with interference injection locking technique," The Conference on Lasers and Electro-Optics (CLEO2011), paper CTuV7, Baltimore, May 2011.
  • Y. Omigawa, Y. Kinoshita, N. Yamamoto, A. Kanno, K. Akahane, T. Kawanishi, and H. Sotobayashi, "Photonic crystal based ultra-broadband transmission system for wave-band division multiplexing," SPIE Optics Optoelectronics 2011, paper 8073B-114, Prague, April 2011.
  • I. Morohashi, T. Sakamoto, N. Yamamoto, H. Sotobayashi, T. Kawanishi, and I. Hosako, "THz-Bandwidth Optical Comb Generation using Mach-Zehnder-Modulator-Based Flat Comb Generator with Optical Feedback Loop," the Optical Fiber Communication Conference (OFC2011), paper JThA029, Los Angeles, March 2011.
  • N. Yamamoto, Y. Omigawa, Y. Kinoshita, A. Kanno, K. Akahane, T. Kawanishi, and H. Sotobayashi, "Polarization Division Multiplexed 2×10-Gbps Optical Data Transmissions over a Holey Fiber in 1-μm-waveband Photonic Transport System," the Optical Fiber Communication Conference (OFC2011), paper ThZ5, Los Angeles, March 2011.
  • N. Yamamoto, Y. Omigawa, Y. Kinoshita, A. Kannno, K. Akahane, T. Kawanishi, and H. Sotobayashi, "Development of broadband optical frequency resource over 8.4-THz in 1.0-μm waveband for photonic transport systems," SPIE Photonic West 2011, paper 7958-14, San Francisco, January 2011.
  • H. Sotobayashi, "Recent progress and prospect of ultra-broadband photonic network (keynote presentation)" International Conference on Communications Systems and Technologies (ICCST2010), San Francisco, October 2010.
  • I. Morohashi, T. Sakamoto, N. Yamamoto, T. Kawanishi, I. Hosako, and H. Sotobayashi, "Broadening of Comb bandwidth by Multiple Modulation using Feedback Loop in Mach-Zehnder-Modulator-Based Flat Comb Generator," IEEE International Topical Meeting on Microwave Photonics (MWP2010), paper TH3-6, pp. 220-223, Montreal, October 2010.
  • A. Kanno, S. Honda, H. Sotobayashi, T. Kawanishi, "12.8-GHz-Bandwidth Frequency Chirp Signal Generation with High-Extinction-Ratio Optical Modulator by Optical Frequency Doubling Technique," IEEE International Topical Meeting on Microwave Photonics (MWP2010), paper TH4-16, pp. 283-285, Montreal, October 2010.
  • N. Yamamoto, D. Murakami, H. Fujioka, K. Akahane, T. Kawanishi, H. Sotobayashi, and H. Takai, "Development of half-cladding semiconductor photonic device structure for surface transmission of light waves," International Conference on Solid State Devices and Materials (SSDM2010), paper D-2-2, Tokyo, September 2010.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, and I. Hosako, "Broadband Optical Comb Generation using Mach-Zehnder-Modulator-Based Flat Comb Generator with Feedback Loop," the 36th European Conference on Optical Communication (ECOC2010), paper P2.16, Turin, September 2010.
  • N. Yamamoto, K. Akahane, T. Kawanishi, R. Naitou, and H. Sotobayashi, "Wavelength Tunable Characteristics of Mid-Infrared Intracavity 3-micron Waveband Light Source with 805-nm-band Laser Diode Excitation," the 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010), paper We-P.65, Rome, September 2010.
  • M. Picollo, C. Cucci, K. Fukunaga, M. Mizuno, K. Yamamoto, and H. Sotobayashi, "A new artists・materials spectroscopic archive in the THz region," the 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010), paper Th-P.01, Rome, September 2010.
  • K. Yamamoto, K. Fukunaga, M. Mizuno, I. Hosako, M. Picollo, and H. Sotobayashi, "Examination of pigments by using FT-THz," the 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010), paper Th-P.04, Rome, September 2010.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, I. Hosako, "Phase Noise Characteristics of Millimeter Wave Generated by Mach-Zehnder-Modulator-Based Flat Come Generator," the 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010), paper Th-P.87, Rome, September 2010.
  • J. Hamazaki, I. Morohashi, N. Sekine, I. Hosako, and H. Sotobayashi, "Mode-locked fiber laser for Teraherz generation" the 5th Workshop on Stimulated Brillouin Scattering & Phase Conjugation (SBS&PC2010), Chiba, August 2010.
  • N. Yamamoto, K. Akahane, T. Kawanishi, and H. Sotobayashi, "Nano-crystalline Sb-based compound semiconductor formed on silicon," the 16th International Conference on Molecular Beam Epitaxy (MBE2010), paper Fri A1.5, Berlin, August 2010.
  • N. Yamamoto, K. Akahane, T. Kawanishi, H. Sotobayashi, H. Fujioka, and H. Takai, "Broadband Light Source using Modulated Quantum Dot Structures with Sandwiched Sub-Nano Separator (SSNS) Technique," the 37th International Symposium on Compound Semiconductors (ISCS2010), WeE3-6, Kagawa, June 2010.
  • N. Yamamoto, R. Naito, K. Akahane, T. Kawanishi, H. Sotobayashi, "Wavelength-Tunable Mid-Infrared 3-μm-Waveband Light Source with 805/1064-nm Differential Frequency Generation in Effective Intracavity System," The Conference on Lasers and Electro-Optics (CLEO2010), paper CThH7, San Jose, May 2010.
  • N. Yamamoto, Y. Omigawa, K. Akahane, T. Kawanishi, and H. Sotobayashi, "Simultaneous Triple-Waveband, 10-Gbps Transmission in 1-μm, C-, and L-Wavebands over a 5.4-km Long Holey Fiber," The Conference on Lasers and Electro-Optics (CLEO2010), paper CWI1, San Jose, May 2010.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, I. Hosako, "Timing Jitter Characteristics of Ultrashort Optical Pulse Generator Using Mach-Zehnder-Modulator-Based Flat Comb," The Conference on Lasers and Electro-Optics (CLEO2010), paper JTuD46, San Jose, May 2010.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, and I. Hosako,"Ultrashort Optical Pulse Generation Using Mach-Zehnder-Modulator-Based Flat Comb Generator and Dispersion-Flattened Dispersion-Decreasing Fiber (invited)," Asia-Pacific Microwave Photonics Conference 2010 (APMP2010), TB2-3, Hong Kong, April 2010.
  • N. Yamamoto, Y. Omigawa, K. Akahane, T. Kawanishi, and H. Sotobayashi, "Simultaneous 3 x 10-Gbps Optical Data Transmission in 1-μm, C-, and L-Wavebands over a Single Holey Fiber for Ultrabroad-Waveband Photonic Transport System," The Optical Fiber Communication Conference (OFC2010), paper OWM2, San Diego, March 2010.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, I. Hosako, "Observation of Narrow Linewidth Beat Signal for Millimeter Wave Generation Using MZM-Based Flat Comb Generator," The Optical Fiber Communication Conference (OFC2010), paper JWA13, San Diego, March 2010.
  • N. Yamamoto, K. Akahane, T. Kawanishi, Y. Omigawa, H. Sotobayashi, "1-μm waveband and C-band, 10-Gbps error-free operation of ultra-broadband photonic transport system with holey fiber," SPIE Photonic West 2010, paper 7621-22, San Francisco, January 2010.
  • N. Yamamoto and H. Sotobayashi, "Quantum Dot Photonic Devices for 1-um Waveband Photonic Transport System (invited),"the 12th International Symposium on Microwave and Optical Technology (ISMOT2009), New Delhi, December 2009.
  • K. Yamamoto, H. Sotobayashi, M. Mizuno, K. Fukunaga, and I. Hosako, "Terahertz spectra of Azurite and Malachite - Influence of grain size," the International Workshop on Terahertz Technology 2009 (TeraTech 2009), Osaka, December 2009.
  • N. Yamamoto, K. Akahane, T. Kawanishi, R. Katouf, and H. Sotobayashi, "Optical Mode-selection of Quantum Dot Frequency Comb Laser for 1-um Waveband Optical Communications," the International Conference on Solid State Devices and Materials (SSDM 2009), paper I-6-3, Sendai, October 2009.
  • N. Yamamoto, K. Akahane, T. Kawanishi, R. Katouf, and H. Sotobayashi, "Development of optical frequency comb generator from single quantum dot laser diode with interference injection seeding technique," the 1st EOS Topical Meeting on Lasers, Capri, September 2009.
  • N. Sekine, Y. Ohno, K. Kanou, H. Sotobayashi, M. Mizuno, K. Fukunaga, I. Hosako, "Portable real-time terahertz imaging system," the 34th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz2009), Busan, September 2009.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, and I. Hosako, "High Accurate and Broadband Optical Comb Generation Using MZM-Based Flat Comb Generator and Soliton," the 34th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz2009), paper W4C03, Busan, September 2009.
  • H. Sotobayashi, K. Akahane, and N. Yamamoto, "OTDM/WDM using Optical Signal Processing (invited)," IEEE Photonics Society Summer Topicals 2009, WC2.1, pp. 113-114, Newport Beach, July 2009.
  • G. Qin, T. Sakamoto, N. Yamamoto, T. Kawanishi, H. Sotobayashi, T. Suzuki, and Y. Ohishi, "Tunable all-optical pulse compression and stretching via doublet Brillouin gain lines in an optical fiber," The European Conference on Lasers and Electro-Optics (CLEO Europe 2009), paper CD.P.1, Munich, June 2009.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, and I. Hosako, "10 GHz-spaced, 20 THz-Wide Comb Generation from CW Light using Mach-Zehnder Modulator Based Comb Generator and Dispersion-Flattened Dispersion-Decreasing Fiber," The European Conference on Lasers and Electro-Optics (CLEO Europe 2009), paper CI4.4, Munich, June 2009.
  • N. Yamamoto, H. Fujioka, K. Akahane, R. Katouf, T. Kawanishi, H. Takai, H. Sotobayashi, "O-Band InAs/InGaAs Quantum Dot Laser Diode with Sandwiched Sub-nano Separator (SSNS) Structures," The 29th Conference on Lasers and Electro Optics and the 27th International Quantum Electronics Conference (CLEO/QELS2009), paper JThE12, Baltimore, June 2009.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, I. Hosako, "Observation of 100 GHz Beat Signal for Millimeter-Wave Generation Using Mach-Zehnder-Modulator-Based Flat Comb Generator," The 29th Conference on Lasers and Electro Optics and the 27th International Quantum Electronics Conference (CLEO/QELS2009), paper JWA75, Baltimore, June 2009.
  • N. Yamamoto, R. Katouf, K. Akahane, T. Kawanishi, H. Sotobayashi, "1-μm Waveband, 12.5-Gbps Transmission with a Wavelength Tunable Single-Mode Selected Quantum-Dot Optical Frequency Comb Laser," The 29th Conference on Lasers and Electro Optics and the 27th International Quantum Electronics Conference (CLEO/QELS2009), paper CMC5, Baltimore, June 2009.
  • N. Yamamoto, R. Katouf, K. Akahane, T. Kawanishi, H. Sotobayashi, "1-μm Waveband, 10Gbps Transmission with a Wavelength Tunable Single-Mode Selected Quantum-Dot Optical Frequency Comb Laser," The Optical Fiber Communication Conference (OFC2009), paper OWJ4, San Diego, March 2009.
  • N. Yamamoto and H. Sotobayashi, "All-band photonic transport system and its device technologies (invited)," SPIE Photonics West, 7235-12, San Jose, January 2009.
  • R. Katouf, N. Yamamoto, K. Akahane, T. Kawanishi, and H. Sotobayashi, "1-μm band transmission by use of a wavelength tunable quantum-dot laser over a hole-assisted fiber," SPIE Photonics West, 7234-14, San Jose, January 2009.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, and I. Hosako, "Cavity-free ultrashort pulse source using Mach-Zehnder-modulator-based flat comb generator," the 2nd Japan-Korea Joint Workshop on THz Technology, Tokyo, October 2008.
  • I. Morohashi, T. Sakamoto, T. Kawanishi, I. Hosako, M. Tsuchiya, and H. Sotobayashi, "Wideband repetition rate tunability of ultrashort pulse generation using MZ-modulator-based flat comb generator and DF-DDF," the IEEE International Microwave Photonics conference (MWP 2008), paper Fri1-4, Gold Coast, September, 2008.
  • N. Yamamoto, H. Sotobayashi, K. Akahane and M. Tsuchiya, "Quantum-Dot Fabry-Perot Laser-Diode with a 4-THz Injection-Seeding Bandwidth for 1-μm Optical-Waveband WDM Systems," the IEEE 22nd International Semiconductor Laser Conference (ISLC2008), P20, Sorrento, September 2008.
  • I. Morohashi, T. Sakamoto, H. Sotobayashi, T. Kawanishi, I. Hosako, M. Tsuchiya, "Wavelength-tunable ultrashort optical pulse generation using Mach-Zehnder-modulator-based flat comb generator," the 34th European Conference on Optical Communication (ECOC 2008), paper P.2.16, Brussels, September, 2008.
  • H. Sotobayashi, "All-band photonic transport system (plenary)," the International Commission for Optics (ICO) 21-2008 Congress, Sydney, July 2008.
  • N. Yamamoto, K. Akahane, H. Sotobayashi, and M. Tsuchiya, "O-band InAs quantum dot (QD) laser diode with Sb-molecule sprayed dot-in-well (DWELL) structures fabricated on GaAs substrates," Joint Conference of the Opto-Electronics and Communications Conference (OECC 2008) and the Australian Conference on Optical Fibre Technology (ACOFT 2008), TuH-3, Sydney, July 2008.
  • K. Akahane, N. Yamamoto, H. Sotobayashi, M. Tsuchiya, "1.7 um laser emission at room temperature using highly-stacked InAs quantum dots," The 2008 IEEE 20th Conference on Indium Phosphide and Related Materials (IPRM 2008), paper TuA2.2, Versailles, May 2008.
  • R. Katouf, A. Kanno, N. Yamamoto, N. Sekine, T. K. Liang, K. Sasagawa, K. Akahane, T. Isu, H. Sotobayashi, and M. Tsuchiya, "15 dB cross loss modulation by cw pump injection of mW-class in 1.5-mm long nano-wire waveguide," Conference on Lasers and Electro-Optics Quantum Electronics and Laser Science Conference (CLEO/QELS 2008), CThT6, San Jose, May 2008.
  • G. Qin, H. Sotobayashi, M. Tsuchiya, A. Mori, T. Suzuki, Y. Ohishi, "Highly Efficient Brillouin Slow Light Generation Using a Single Mode Tellurite Fiber," Conference on Lasers and Electro-Optics Quantum Electronics and Laser Science Conference (CLEO/QELS 2008), CTuB6, San Jose, May 2008.
  • N. Yamamoto, H. Sotobayashi, K. Akahane, M. Tsuchiya, K. Takashima, H. Yokoyama, "1-μm Waveband 10-Gbit/s Transmission over a 7-km Single-Mode Hole Assisted Fiber Using a Harmonically Mode-Locked Semiconductor Laser," Conference on Lasers and Electro-Optics Quantum Electronics and Laser Science Conference (CLEO/QELS 2008), CTuLL4, San Jose, May 2008.
  • I. Morohashi, T. Sakamoto, H. Sotobayshi, I. Hosako, T. Kawanishi, and M. Tsuchiya, "10 GHz 200 fs pulse generation from Mach-Zehnder-modulator- based optical frequency comb generator," the 2008 Optical Fiber Communication Conference (OFC2008), San Diego, USA, 28 Feb., 2008.
  • H. Sotobayashi, "Ultrafast photonic processing and its applications to ultra-wideband photonic networks (invited)," Asia Pacific Laser Symposium (APLS 2008, Nagoya, January, 2008.
  • H. Sotobayashi, N. Yamamoto, K. Akahane, M. Tsuchiya, "All-band photonic transport system and its enabling technologies (invited)," International Conference on Communications Systems and Technologies (ICCST 2007), San Francisco, October 2007.
  • H. Sotobayashi, N. Yamamoto, K. Akahane, M. Tsuchiya, K. Takashima, H. Yokoyama, "Development of a 1030-nm mode-locked semiconductor laser and its applications (invited)," SPIE Optics East 2007, Boston, September 2007.
  • G. Qin, Y. Ohishi, H. Sotobayashi, M. Tsuchiya, A. Mori, "Stimulated Brillouin amplification in a tellurite fiber as a potential system for slow light generation," European Conference and Exhibition on Optical Communication (ECOC2007), paper 2.4.4, Berlin, September 2007.
  • K. Akahane, N. Yamamoto, S. Gozu, A. Ueta, H. Sotobayashi, and M. Tsuchiya, ""High bandwidth semiconductor gain material for photonic active devices with a stacked quantum dots structure grown by strain-compensation technique," the 12th Optoelectronics and Communications Conference (OECC 2007), Yokohama, July 2007.
  • H. Sotobayashi, "Ultrawideband 40GHz optical comb generation and its distribution through WDM optical fiber networks," European Frequency and Time Forum (EFTF2007), paper C1LB2, May 2007.
  • H. Sotobayashi, "Ultrafast optical code division multiplexing and its enabling components (TUTORIAL presentation" SPIE Optics East, paper 6089-22, Boston, October 2006.
  • T. Isu, J. Inoue, K. Akahane, H. Sotobayashi, M. Tsuchiya, "Nonlinear absorption of highly stacked InAs quantum dot layers on an InP(311) substrate (Invited)," SPIE Optics East, paper 6093-09, Boston, October 2006.
  • H. Sotobayashi, "Code-division Multiplexing Technique Applied to Photonic Networks (PLENARY presentation)," IASTED International Conference Communication Systems and Networks (CSN 2006), Palma de Mallorca, August 2006.
  • H.Sotobayashi, "Supercontinuum generation based photonic processing applied to multiplexing format conversions (Invited)," the 11th European Conference on Networks & Optical Communications (NOC 2006), Berlin, July 2006.
  • P.T. Rakich, H. Sotobayashi, J.T. Gopinath, J. W. Sickler, C. W. Wong, M. Qi, S. G. Johnson, E. Lidorikis, J. D. Joannopoulos, H. I. Smith ,and E. P. Ippen, "Broadband Optical Studies of Nano-Scale 1-D and 3-D Photonic Crystals,”2006 Asia-Pacific Microwave Photonics Conference (AP-MWP2006), paper J1, Kobe, April 2006.
  • H. Sotobayashi, "Supercontinuum generation based lightwave management applied to multiplexing format conversion," SPIE Photonics Europe, paper 6187-21, Strasbourg, April 2006.
  • H. Sotobayashi, J. T. Gopinath, H. M. Shen, J. W. Sickler, P. T. Rakich, and E. P. Ippen, "Supercontinuum generation and its applications (invited paper)," SPIE Optics East, paper 6014-30, Boston, October 2005.
  • P.T. Rakich, H.Sotobayashi, J.T. Gopinath, J. W. Sickler, C. W. Wong, M. Qi, S. G. Johnson, E. Lidorikis, J. D. Joannopoulos, H. I. Smith ,and E. P. Ippen, "Broadband studies of 1D and 3D photonic crystals (invited paper)," SPIE Optics East, paper 6017-02, Boston, October 2005.
  • P.T. Rakich, H.Sotobayashi, J.T. Gopinath, J. W. Sickler, C. W. Wong, M. Qi, S. G. Johnson, E. Lidorikis, J. D. Joannopoulos, H. I. Smith ,and E. P. Ippen, "Broadband optical studies of 1D and 3D photonic crystals (invited)," the 10th European Conference on Networks & Optical Communications (NOC 2005), London, July 2005.
  • K. Kitayama, X. Wang, H. Sotobayashi, "Gigabit-symmetric FTTH -OCDMA over WDM PON-," 9th Conference on Optical Network Design and Modelling(ONDM 2005), no. 8.3., pp. 273-281, Milan, February 2005.
  • P. T. Rakich, J. T. Gopinath, H. Sotobayashi, C. W. Wong, S. G. Johnson, J. D. Joannopoulos, and E. P. Ippen, "Broadband Supercontinuum based Measurements of High-Index Contrast Photonic Bandgap Devices from 1 to 2 μm," IEEE LEOS annual meeting 2004, paper ThI3, Puerto Rico, November 2004.
  • J. T. Gopinath, H. M. Shen, H. Sotobayashi and E. P. Ippen, "Novel Highly Nonlinear Bismuth Oxide Fiber for Supercontinuum Generation," IEEE LEOS annual meeting 2004, paper WD2, Puerto Rico, November 2004.
  • H. Sotobayashi, J. T. Gopinath, J. W. Sickler, and E. P. Ippen, "Broadband fiber lasers using Bismuth Oxide-based Erbium-doped fiber amplifiers (invited)" SPIE Optics East, paper 5595-03, Philadelphia, October 2004.
  • Y. Takushima, H. Sotobayashi, M. E. Grein, E. P. Ippen, and H. A. Haus, "Linewidth of mode combs of passively and actively mode-locked semiconductor laser diodes (invited)," SPIE Optics East, paper 5595-31, Philadelphia, October 2004.
  • K. Kitayama, X. Wang, H. Sotobayashi, "State of the Art of OCDMA, OCDM, and OC-label Switchings (invited)," 30th European Conference on Optical Communication(ECOC2004), Stockholm, no. Tu4.6.1, pp.266-269, September 2004.
  • H. Sotobayashi, J. T. Gopinath, J. W. Sickler, and E. P. Ippen, "Novel fiber laser technologies using broadband Bismuth Oxide-based Erbium-doped fiber amplifiers (invited)" the 9th European Conference on Networks & Optical Communications (NOC 2004), paper no.5, Eindhoven, June 2004.
  • J. W. Sickler, J. T. Gopinath, S. N. Tandon, H. Sotobayashi, G. S. Petrich, L. A. Kolodziejski, and E. P. Ippen, "Femtosecond laser using broadband erbium-doped bismuth oxide gain fiber," Conference on Lasers and Electro-Optics Quantum Electronics and Laser Science Conference (CLEO/QELS 2004), CThK6, San Francisco, May 2004.
  • Y. Awaji, H. Sotobayashi, and F. Kubota, "4 x 160 Gbit/s WDM transmission by a cascade of semiconductor LOAs," Conference on Lasers and Electro-Optics Quantum Electronics and Laser Science Conference (CLEO/QELS 2004), CThQ2, San Francisco, May 2004.
  • H. Sotobayashi, J.T. Gopinath, and E.P. Ippen, "Broadband bismuth oxide-based erbium-doped fiber lasers (Invited)," SPIE Photonics Europe 2004, paper 5460-01, Strasbourg, April 2004.
  • H. Sotobayashi, J.T. Gopinath, Y. Takushima, E.P. Ippen, and K. Hsu, "90 nm wavelength tunable single frequency Bi2O3-based Erbium-doped fiber lasers," IEEE LEOS annual meeting 2003, paper ThD3, Tucson, October 2003.
  • Y. Awaji, H. Sotobayashi, and F. Kubota, "80 Gbit/s x 6WDM Transmission Experiment over 100 km by using Cascaded LOAs as Repeaters," IEEE LEOS annual meeting 2003, paper WY4, Tucson, October 2003.
  • H. Sotobayashi, J.T. Gopinath, and E.P. Ippen, "Bi2O3-Based Erbium-Doped Fibers for Broadband Photonic Network Applications (Invited)," The 2nd Symposium on Photonics, Networking and computing (PNC 2003), PNC-2, Cary, September 2003.
  • H. Sotobayashi, J.T. Gopinath, E.M. Koontz, L.A. Kolodziejski, and E.P. Ippen, "Passively mode-locked Bi2O3-based Erbium-doped fiber laser with a 30 nm wavelength tunability in the L-band," The 29th European Conference on Optical Communication (ECOC 2003), We2.6.2., Rimini, September 2003.
  • H. Sotobayashi, "Ultrafast optical code division multiplexing and its applications to ultrafast photonic networks (Plenary)," The 7th conference on optics (ROMOPTO 2003), PI4, Constanta, September 2003.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Ultrafast OTDM/WDM networks by use of photonic processing (Invited)," The 7th conference on optics (ROMOPTO 2003), Constanta, III.I.6, September 2003.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Ultrafast photonic technologies for the hierarchical hybrid OTDM/WDM photonic networks (Invited)," paper 5246-43, Information Technologies and Communications (ITCom 2003), Orlando, September 2003.
  • H. Sotobayashi, "Optical code division multiplexing based ultrafast photonic netowk (Invited)," 9th International Symposium on Microwave and Optical Technology (ISMOT 2003), paper 156, Ostrava, August 2003.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Ultrafast Hierarchical Hybrid OTDM/WDM Network," The 7th World Multiconference on Systemics, Cybernetics and Informatics (SCI2003), vol. X, pp. 72-75, Orlando, July 2003.
  • J. Gopinath, H. Sotobayashi, and E. Ippen, "Picosecond pulse amplification over a bandwidth of 80 nm in a 23 cm length of Bi2O3-based Erbium-doped fiber," OSA Optical Amplifiers and Their Applications (OAA 2003), paper MD23, Otaru, July 2003.
  • H. Sotobayashi, "Novel ASE Noise Reduction by using Optical Time-gating Technique in Optically Preamplified Direct-detection Systems," Wireless and Optical Communications (WOC 2003), paper 383-155, Banff, July 2003.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Ultrafast photonic processing and its application to ultra-wideband OTDM/WDM networks (Invited)," 8th European Conference on Networks & Optical Communications (NOC 2003), pp. 75-82, Vienna, July 2003.
  • Y. Awaji, J. Inoue, H. Sotobayashi, F. Kubota, and T. Ozeki, "Nonlinear inter-channel cross talk of linear optical amplifier (LOA) in DWDM applications," Optical Fiber Communication Conference (OFC 2003), ThC4, Atlanta, March 2003.
  • H. Sotobayashi, "Ultra-broadband photonic networks based on optical code division multiplexing," IASTED International Conference Communications, Internet and Information Technology (CIIT 2002), 376-140, St. Thomas, November 2002.
  • H. Sotobayashi, "OCDM techniques for improved spectral efficiency (Invited),"IEEE LEOS annual meeting (LEOS 2002), ThY1, Glasgow, November 2002.
  • J. Inoue, H. Sotobayashi, W. Chujo, and H. Kawaguchi, "An 80 Gbit/s RZ and carrier-suppressed-RZ signal transmission over 200-km standard single-mode fiber by using mid-span optical phase conjugation based on four-wave mixing in semiconductor optical amplifiers," IASTED International Conference on Communications and Computer Networks (CCN 2002), 381-069, Cambridge, November 2002.
  • H. Sotobayashi, W. Chujo, and K. Kitayama, "Photonic gateways: 40 Gbit/s bi-lateral multiplexing format conversions of OTDM-WDM-OTDM and OCDM-WDM-OCDM," IASTED International Conference on Communications and Computer Networks (CCN 2002), 381-059, Cambridge, November 2002.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Hierarchical hybrid OTDM/WDM network based on ultrafast photonic processing," IASTED International Conference Communication Systems and Networks (CSN 2002), 371-105, Malaga, September 2002.
  • H. Toda, M. Suzuki, R. Takami, H. Sotobayashi, T. Miyazaki, T. Makino, J. Inoue, and W. Chujo, "1.5 Tbit/s (75 x 20 Gbit/s) DWDM transmission using Er3+-doped Tellurite fiber amplifiers and a single OTDM demultiplexing scheme," 28th European Conference on Optical Communication (ECOC 2002), paper 3.1.6, Copenhagen, September 2002.
  • T. Miyazaki, H. Sotobayashi, and W. Chujo, "Optical sampling and demultiplexing of 80 Gb/s OTDM signals with optically recovered clock by injection mode-locked laser diode," 28th European Conference on Optical Communication (ECOC 2002), paper 2.1.6, Copenhagen, September 2002.
  • H. Sotobayashi, "Ultra-fast photonic networks based on optical code division multiplexing (Tutorial)," XXVIIth URSI General Assembly, The Commission D Tutorial, DT, Maastricht, August 2002.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Hierarchical Hybrid OTDM/WDM Network (Invited)," IEEE LEOS Summer Topicals 2002, WF3, Quebec, July 2002.
  • H. Sotobayashi, "OCDM techniques for improved spectral efficiency (Invited),"Optical Amplifiers and their Applications (OAA 2002), OTuB1, Vancouver, July 2002.
  • T. Makino, H. Sotobayashi, and W. Chujo, "1.5Tbit/s (75 x 20 Gbit/s) DWDM transmission with a 63nm continuous bandwidth ssing Er-doped Tellurite fiber amplifiers," 7th OptoElectronics and Communications Conference (OECC2002), 10B3-4, Yokohama, July 2002.
  • J. Inoue, H. Sotobayashi, W. Chujo, and H. Kawaguchi, "80-Gbit/s carrier-suppressed RZ signal transmission over 208-km standard fiber using an optical phase conjugation," 7th OptoElectronics and Communications Conference (OECC2002), 9B1-3, Yokohama, July 2002.
  • J. Inoue, H. Sotobayashi, and W. Chujo, "Picosecond 80-Gbit/s OTDM signal transmission over 208-km standard fiber using midspan optical phase conjugation," Conference on Lasers and Electro-Optics Quantum Electronics and Laser Science Conference (CLEO/QELS 2002), CThN3, pp. 496, Long Beach, May 2002.
  • H. Sotobayashi, W. Chujo, and K. Kitayama, "Photonic gateway for bi-directional OCDM - WDM conversions at 40 Gbit/s (4 x 10 Gbit/s)," Optical Fiber Communication Conference (OFC 2002), ThEE2, Anaheim, March 2002.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Inter-wavelength-band conversions and demultiplexings of 640 Gbit/s OTDM signals," Optical Fiber Communication Conference (OFC 2002), WM2, Anaheim, March 2002.
  • H. Sotobayashi, W. Chujo, and K. Kitayama, "Optical Code Division Multiplexing (OCDM) and Its Application for Peta-bit/s Photonic Network (Invited)," 1 st Symposium on Photonics, Networking and Computing (PNC 2002), pp. 1371-1374, Durham, March 2002.
  • H. Sotobayashi, W. Chujo, and K. Kitayama, "1.6 bit/s/Hz, 6.4 Tbit/s OCDM/WDM (4OCDMx 40WDMx 40Gbit/s) transmission experiment," 27th European Conference on Optical Communication (ECOC 2001), PD.M.1.3, vol. 6, pp. 6-7, Amsterdam, October 2001.
  • H. Sotobayashi, M. Masuda, K. Yamada, T. Kudou, W. Chujo, and T. Ozeki, "Suppression of PMD induced pulse broadening by using nonlinear evolution of polarization mode-coupling," 27th European Conference on Optical Communication (ECOC 2001), We.A.3.4, vol. 3, pp. 350-351, Amsterdam, October 2001.
  • H. Sotobayashi, A. Konishi, W. Chujo, and T. Ozeki, "Simultaneously generated 3.24 Tbit/s (81 WDM x 40 Gbit/s) carrier suppressed RZ transmission using a single supercontinuum source," 27th European Conference on Optical Communication (ECOC 2001), Mo.F.3.3, vol. 1, pp. 56-57, Amsterdam, October 2001.
  • H. Sotobayashi, C. Sawaguchi, Y. Koyamada, and W. Chujo, "Walk-off free ultrafast nonlinear optical loop mirror composed of a highly-nonlinear dispersion-shifted fiber for demultiplexing 320 Gbit/s TDM signals," Optical Amplifiers and their Applications (OAA 2001), OTuA6, pp. OtuA6-1-OTuA6-3, Stresa, July 2001.
  • K. Yamada, M. Masuda,T. Kudou, T. Ozeki, H. Sotobayashi, and W. Chujo, "Broadband simultaneous adaptive PMD equalization in 9 x 40 Gbit/s WDM transport networks," Optoelectronics and Communications Conference (OECC/IOOC 2001), PO.1.13, pp. 367-368, Sydney, July 2001.
  • H. Sotobayashi, W. Chujo, and K. Kitayama, "1.52 Tbit/s OCDM/WDM (4 OCDM x 19 WDM x 20 Gbit/s) transmission experiment based on simultaneous optical encoding of a single supercontinuum source," 6 th European Conference on Networks & Optical Communications (NOC2001), pp. 442-447, Ipswich, July 2001.
  • J. Inoue, H. Sotobayashi, and W. Chujo, "160 Gbit/s, 600 fs signal generation by chirping compensation of directly pumped supercontinuum source," The 8th International Workshop on Femtosecond Technology (FST2001), FC-5, p. 155, Tsukuba, June 2001.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Wideband and tunable wavelength conversion of 10 Gbit/s RZ data sequences based on optical time-gating of supercontinuum source," Conference on Lasers and Electro-Optics Quantum Electronics and Laser Science Conference (CLEO/QELS 2001), CThB5 pp. 385-386, Baltimore, May 2001.
  • H. Sotobayashi, and W. Chujo, "Novel all-optical demultiplexing technique by OTDM-to-WDM conversion at 80 Gbit/s based on four-wave mixing with supercontinuum source," Nonlinear Guided Waves and Their Applications (NLGW 2001), MB3, pp. 26-28, Clearwater, March 2001.
  • H. Sotobayashi, W. Chujo, and T. Ozeki, "Bi-directional photonic conversion between 4x10 Gbit/s OTDM and WDM by optical time-gating wavelength interchange," Optical Fiber Communication Conference (OFC 2001), WM5, pp. WM5-1-WM5-3, Anaheim, March 2001.
  • H. Sotobayashi, W. Chujo, and K. Kitayama, "Demonstration of ultra-wideband and transparent virtual optical code/wavelength path network," Optical Fiber Communication Conference (OFC 2001), TuV4, pp. TuV4-1-TuV4-3, Anaheim, March 2001.
  • H. Sotobayashi, K. Kitayama, T. Hashimoto, and W. Chujo, "Photonic gateway (invited)," International Topical Workshop on Contemporary Photonic Technologies (CPT2001), Wc-3, pp. 151-154, Tokyo, January 2000.
  • K. Kitayama, H. Sotobayashi,T. Hashimoto and W. Chujo, "Photonic gateway for TDM - WDM - TDM: 40 Gbit/s (4 x 10 Gbit/s) conversion and reconversion," 26th European Conference on Optical Communication (ECOC 2000), paper 9.4.3, pp. 301-302, vol. 3, Munich, September 2000.
  • H. Sotobayashi, K. Kitayama.and W. Chujo, "Photonic compression and decompression of 40 Gbit/s packet by supercontinuum generation, " 11th Optical Amplifiers and their Applications (OAA 2000), OtuC, pp. 133-135, Quebec, July 2000.
  • H. Sotobayashi, W. Chujo and K. Kitayama, "3 x 10 Gbit/s OCDM transmission at 1550 nm band over 150 km standard fiber using midspan optical phase conjugation, " Fifth Optoelectronics and Communications Conference (OECC2000), 14A2-4, pp. 456-457, Chiba, July 2000.
  • H. Sotobayashi and K. Kitayama, "All-optical code conversion of 10 Gb/s BPSK codes without wavelength-shift by cross-phase modulation for optical code division multiplexing networks ," Optical Fiber Communication Conference (OFC 2000), WJ7, pp. 163-165, Baltimore, March 2000.
  • H. Sotobayashi and K. Kitayama, "All-optical simultaneous optical code and wavelength conversion in the OCDM/WDM network nodes by FWM in an optical fiber," International Topical Workshop on Contemporary Photonic Technologies (CPT2000), Tc-21, pp. 113-114, Tokyo, January 2000.
  • N. Wada, and H. Sotobayashi, "Optical code division multiplexing (OCDM) and its application to photonic networks," Photonic Network Forum (PNF'99), B1, pp. B1-1-B1-4, Tokyo, October 1999.
  • N. Wada, H. Sotobayashi, and K. Kitayama, "Error-free transmission of 2-channel x 2.5 Gbit/s time-spread / wavelength-hop OCDM using fiber bragg grating with supercontinuum light source," European Conference on Optical Communication (ECOC '99), Th C1.1, Nice, September 1999.
  • H. Sotobayashi and K. Kitayama, "10 Gb/s OCDM/WDM multiple access using spectrum-sliced supercontinuum BPSK pulse code sequences," Optical Amplifiers and their Applications (OAA '99), PD7, pp. Pdp7-1-Pdp7-3, Nara, June 1999.
  • H. Sotobayashi and K. Kitayama, "All-optical code and wavelength conversion of 10 Gb/s BPSK codes by four-wave mixing in semiconductor optical amplifier for optical code division multiplexing," Optical Amplifiers and their Applications (OAA '99), FA3, pp. 238-240, Nara, June 1999.
  • H. Sotobayashi and K. Kitayama, "1.24 Gb/s, 40 km optical code division multiplexing transmission by using spectral bipolar coding of broadband incoherent light," Optical Fiber Communication Conference (OFC '99), WE7, pp. 92-94, San Diego, February 1999.
  • K. Kitayama and H. Sotobayashi, "Fading-free fiber-optic transport of 60 GHz-optical DSB signal by using in-line phase conjugator," Optical Fiber Communication Conference (OFC '99), WD4, pp. 64-66, San Diego, February 1999.
  • K. Kitayama and H. Sotobayashi, "Optical code-wavelength conversion for hybrid OCDM/WDM networks," 24th European Conference on Optical Communication (ECOC '98), TuD11, pp. 339-340, Madrid, September 1998.
  • H. Sotobayashi and K. Kitayama, "Simplified approach to supercontinuum generation at 10 Gbit/s using dispersion-flattened uniform normal dispersion fiber along with pulse compression technique, " Third Optoelectronics and Communications Conference (OECC '98), 15A3-5, pp. 332-333, Chiba, July 1998.
  • H. Sotobayashi, I. Andonovic, N. Wada, and K. Kitayama, "Coherent en/decoding of 20-chip long hybrid BPSK and frequency varying code using time-stretched SC laser pulses for giga-bit optical code division multiplexing, " Third Optoelectronics and Communications Conference (OECC '98), 14P-13, pp. 212-213, Chiba, July 1998.

Books

  • H. Sotobayashi, "Ultrafast Photonic Processing Applied to Photonic Networks," chapter 32 of "Advances in Information Optics and Photonics," SPIE Press, pp. pp. 687-711, June, 2008.
  • "The Handbook of Computer Networks (three volume set)", John Wiley & Sons, Inc., 2007. (Editorial board member)
  • H. Sotobayashi, "Optical code division multiple access: fundamentals and applications," Chapter 7 "Hybrid multiplexing techniques (OCDMA/TDM/WDM)," pp. 241-271, Crc press Taylor & Francis, New York, NY, U.S.A., 2005.
  • H. Sotobayashi and T. Ozeki, "WDM Technologies: Optical Networks," Chapter 2 "OTDM and WDM for Large-Scale Photonic Networks," pp. 13-61, Elsevier Academic Press, Burlington, MA, U.S.A., 2004.
  • H. Sotobayashi and K. Kitayama, "Optical code based label swapping for photonic routing," in "High-performance backbone network technology," pp. 909-915, Marcel Dekker, New York, U.S.A., 2004.

Bulletins
  • P. T. Rakich, H. Sotobayashi, J. T. Gopinath, J. W. Sickler, C. W. Wong, S. G. Johnson, M. Qi, E. Lidorikis, H. I. Smith, J. D. Joannopoulos and E. P. Ippen, "Unpolarized Supercontinuum Sources for Broadband Studies of 1D and 3D Photonic Crystals," MIT RLE Progress Report 148, chapter 29, pp. 90-96, 2008.
  • P. T. Rakich, H. Sotobayashi, J. T. Gopinath, J. W. Sickler, C. W. Wong, S. G. Johnson, M. Qi, E. Lidorikis, H. I. Smith, J. D. Joannopoulos and E. P. Ippen, "Broadband Optical Studies of 1-D and 3-D Photonic Crystals," MIT RLE Progress Report 147, chapter 26, pp. 71-76, 2007.
  • H. Sotobayashi, "Supercontinuum Generation and its Applications," Journal of the NAtional Institute of Information and Communication Technoplogy, vol. 53, no. 3, pp. 33-40, 2006.
  • P. T. Rakich, C. W. Wong, S. G. Johnson, J.Gopinath, H. Sotobayashi, J. D. Joannopoulos, E. P. Ippen, "Broadband Spectral Measurements of High-Index Photonic Circuits Using Supercontinuum Light Source from 1 to 2 μm", MIT RLE Progress Report 146, chapter 24, pp. 57-60, 2006.
  • J. W. Sickler, J. T. Gopinath, S. N. Tandon, P. T. Rakich, H. Sotobayashi, G. S. Petrich, L. A. Kolodziejski, E. P. Ippen, "Fiber Laser Studies using Erbium-doped Bismuth Oxide Gain Fiber," MIT RLE Progress Report 146, chapter 24, pp. 28-30, 2006.
  • P. T. Rakich, S. Assefa, P. Bienstman, S. G. Johnson, J. Gopinath, H. Sotobayashi, G. S. Petrich, J. D. Joannopoulos, L. A. Kolodziejski, E. P. Ippen, H. I. Smith, "Guiding and Band Edge Measurements of 2-Dimensional Photonic Crystal Slab Formed by Posts," MIT RLE Progress Report 145, chapter 24, pp. 67-69, 2005.
  • I. Morohashi, T. Sakamoto, S. Saitou, H. Sotobayashi, T. Kawanishi, N. Sekine, I. Hosako, M. Tsuchiya, "High-Repetition TDS System," Journal of the NAtional Institute of Information and Communication Technoplogy, vol. 55, no. 1, pp. 45-52, 2008.

Awards and Honors

  • The Research fellow of the Japan Society for the Promotion of Science (1995-1997).
  • The 1999 Young Engineer Award from the Institute of Electronic and Communication Engineers of Japan.
    "10 Gb/s OCDM/WDM multiple access using spectrum-sliced supercontinuum BPSK pulse code sequences"
  • The 2000 Novel Research Award from Research Foundation for Opto-Science and Technology.
    "Excellent research activities on the next generation photonic network"
  • The 60th Novel Patent Award of the Ministry of Education, Culture, Sports, Science, and Technology, 2001.
    "Dispersion measurement methods of the optical transport system"
  • The 2002 Overseas Research Fellow of the Japan Society for the Promotion of Science.
  • The best paper award of the OptoElectronics and Communications Conference 2002 (OECC),
    J. Inoue, H. Sotobayashi, W. Chujo, and H. Kawaguchi, "80-Gbit/s carrier-suppressed RZ signal transmission over 208-km standard fiber using an optical phase conjugation," the 7th OptoElectronics and Communications Conference (OECC2002), 9B1-3, Yokohama, July 2002.
  • The 18th Telecom System Technology Award of the Telecommunications Advancement Foundation, 2002.
    H. Sotobayashi, W. Chujo, and K. Kitayama, "Transparent virtual optical code/wavelength path network," IEEE Journal of Selected Topics in Quantum Electronics, vol. 8, no. 3, pp. 699-704, 2002.
  • The 44th Optics Prize for excellent papers of the Japan Society of Applied Physics, 2002.
    H. Sotobayashi, W. Chujo and K. Kitayama, "1.6-b/s/Hz 6.4-Tb/s QPSK-OCDM/WDM (4 OCDM x 40 WDM x 40 Gb/s) transmission experiment using optical hard thresholding," IEE Photonics Technology Letters, vol. 14, no.4, pp. 555-557, 2002.
  • The best paper award of the 7th World Multiconference on Systemics, Cybernetics and Informatics (SCI2003)
    H. Sotobayashi, W. Chujo, and T. Ozeki, "Ultrafast Hierarchical Hybrid OTDM/WDM Network," The 7th World Multiconference on Systemics, Cybernetics and Informatics (SCI2003), Orlando, July 2003.
  • The 2005 Young Scientist Award from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.
  • The ICO Prize in Optics from the International Commission for Optics.http://www.ico-optics.org/ico_jan07.html

last update: August, 2009