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Year of Birth 1952
Title Vice-President, Professor
Belong to Chubu University
Dept. of Electronics and Information Engineering
Electrical and Electronic Engineering (graduate school)
Planning Office for the Promotion of Research
Graduated Tokyo Institute of Technology
Degree Dr. Eng.
Academic Institutional Membership The Institute of Electronics, Information and Communication Engineers (Fellow)
The Japan Society of Applied Physics (Fellow)
Institute of Electrical and Electronics Engineers (IEEE) (Fellow)
Optical Society of America (OSA)
Field of Study Opto-electronics
Research, Studies Integrated photonics, Ultra-large capacity optical fiber transmission
Curriculum Specialized Electric Circuits I, Applied Practice in Electronics and Information Engineering B
Contact Mail address:ykokubun(at)

Books Published, Translation

Yasuo Kokubun, "Lightwave Engineering", CRC Press (Optical Science and Engineering Series), August 23, 2012.

Kenichi Iga, Yasuo Kokubun (Editors), "Encyclopedic Handbook of Integrated Optics," CRC Press,Nov. 1, 2005.

Academic Papers, Critique

N. Kobayashi, Y. Kawamura, R. Aoki, Y. Kokubun, "Nonlinear model analysis of all-optical flip-flop and inverter operation of microring laser," Jpn. J. Appl. Phys., vol.57, no.3, 032201, Feb. 6, 2018.

Seiya Miura, Tatsuhiko Watanabe, and Yasuo Kokubun, "Accurate analysis of crosstalk between LP$_{11}$ quasi-degenerate modes due to offset connection using true eigenmodes," Photonics Journal, vol.10, no.1, pp.1-11 (7900811), February 1, 2018. DOI: 10.1109/JPHOT.2017.2786706

Ryo Kawata, Tatsuhiko Watanabe, and Yasuo Kokubun, "Full-set high-speed mode analysis in few-mode fibers by polarization-split segmented coherent detection method: Proposal and simulation of calculation error," IEICE Electron. Express (ELEX), vol.15, no.1, pp.1-12, Jan. 10, 2018. DOI: 10.1587/elex.14.20171132

Yasuo Kokubun, "Waveguide filters and related technologies - issues and solutions for practical use in transmission systems -," (Invited tutorial paper) J. Lightwave Technol., vol.36, Issue 1, pp.6-18, Jan. 1, 2018. DOI:10.1109/JLT.2017.2767565

K. Suzuki, T. Hirayama, Y. Kokubun, and T. Arakawa, "Proposal of waveguide-type polarization switch based on microring resonator," IEICE Trans. Electronics, vol.E100-C, no.10, pp.767-773, Oct. 2017. DOI: 10.1587/transele.E100.C.767

Soichiro Yoshida, Shintaro Ishihara, Yoshiaki Nishijima, Yasuo Kokubun, and Taro Arakawa, "Improved Sensitivity of Microring Resonator-Loaded Mach-Zehnder Interferometer Biosensor," Sensors and Materials, vol.29, no.9, pp.1241-1246, Sep. 2017.

Soichiro Yoshida, Shintaro Ishihara, Taro Arakawa, and Yasuo Kokubun, "Highly-Sensitive Optical Biosensor Based on Silicon Microring Resonator-Loaded Mach-Zehnder Interferometer," Jpn. J. Appl. Phys., vol.56, 04CH08, March 16, 2017.

Yasuo Kokubun, Tatsuhiko Watanabe, Seiya Miura, and Ryo Kawata, "What is a mode in few mode fibers?: Proposal of MIMO-free mode division multiplexing using true eigenmodes," IEICE Electronics Express, vol.13, no.18, pp.1-12, June 3, 2016. DOI: 10.1587/elex.13.20160394

Yasuo Kokubun, Tatsuhiko Watanabe, Ryo Kawata, and Kohei Morita, "Full set mode analysis of three mode fibers calculated from polarization components of Near-Field Pattern," Jpn. J. Appl. Phys. (MOC'15 Special Issue), vol.55, 08RB03, July 11, 2016. DOI:

Nobuyuki Hayasaka, Taro Arakawa, and Yasuo Kokubun, "Design of Fourth-Order Series Coupled Microring Filter on Chebyshev Filter Condition," Trans. IEICE, vol.E99-C, no.2, pp.235-241, Feb. 2016. DOI:10.1587/transele.E99.C.235

Jun Sakaguchi, Werner Klaus, Jose Manuel Delgado Mendinueta, Benjamin James Puttnam, Ruben Soares Luis, Yoshinari Awaji, Naoya Wada, Tetsuya Hayashi, Tetsuya Nakanishi, Tatsuhiko Watanabe, Yasuo Kokubun, Taketoshi Takahata, and Tetsuya Kobayashi, "Large Spatial Channel (36-Core × 3 mode) Heterogeneous Few-Mode Multicore Fiber," J. Lightwave Technol., vol.34, no.1, pp.93-103, Jan. 1, 2016. DOI:10.1109/JLT.2015.2481086

Tatsuhiko Watanabe, Kyohei Kojima, and Yasuo Kokubun, "Serial branching mode multi/demultiplexer for homogeneous multi-core fibers," IEICE Electronics Express, vol.13, no.1, pp.1-12, Jan. 10, 2016. DOI:10.1587/elex.12.20150961

Tatsuhiko Watanabe, and Yasuo Kokubun, "Demonstration of mode-evolutional multiplexer for few-mode fibers using stacked polymer waveguide," IEEE Photonics Journal, vol.7, no.6, 7103311, Dec. 2015. DOI: 10.1109/JPHOT.2015.2497234

Tatsuhiko Watanabe, and Yasuo Kokubun, "Stacked Polymer Waveguide type Fan-in/Fan-out Device for Dense Multi-core Fiber," IET Optoelectronics, pp.1-5, March 26, 2015. DOI: 10.1049/iet-opt.2014.0137

Tominari Miyamoto, Shu Umehara, Hiroki Kobayashi, Riichi Taniguchi, Redouane Katouf, Taro Arakawa, and Yasuo Kokubun, "All optical Flip-Flop and Inverter Using Adjacent Lasing Wavelengths by Semiconductor Microring Laser," Jpn. J. Appl. Phys., (Special Issue on MOC'13), vol.53, no.8S2, 08MB04, Aug. 2014. DOI: 10.7567/JJAP.53.08MB04

Tatsuhiko Watanabe, and Yasuo Kokubun, "Ultra-large number of transmission channels in space division multiplexing using Few-mode Multi-core Fiber with optimized air-hole-assisted double-cladding structure," Optics Express, vol.22, no.7, pp.8309-8319, Apr. 7, 2014. doi: 10.1364/OE.22.008309

Rajdeep Gautam, Hiroki Kaneshige, Hitoshi Yamada, Taro Arakawa, and Yasuo Kokubun, "Thermooptically-Driven Silicon Microring-Resonator-Loaded Mach-Zehnder Modulator for Low-Power Operation and Multiple-Wavelength Modulation," Jpn. J. Appl. Phys., vol.53, 022201 (7pages), Jan. 6 (online), 2014. DOI: 10.7567/JJAP.53.022201

Yasuo Kokubun and Masanori Koshiba, "Novel Multi-Core Fibers for Mode Division Multiplexing: Proposal and Design Principle," IEICE Electronics Express, vol.6, no.8, pp.522-528, April 25, 2009. DOI: 10.1587/elex.6.522

Masanori Koshiba, Kunimasa Saitoh, and Yasuo Kokubun, "Heterogeneous Multi-Core Fibers: Proposal and Design Principle," IEICE Electronics Express, vol.6, no.2, pp.98-103, Jan. 25, 2009. DOI: 10.1587/elex.6.98

Yasuo Kokubun, "High index contrast optical waveguides and their applications to microring filter circuit and wavelength selective switch," (Invited paper), IEICE Trans. Electronics (Special Selection on Recent Advances in Integrated Photonic Devices), vol.E90-C, no.5, pp.1037-1045, May 2007. DOI: 10.1143/JJAP.46.3428

Yasuo Kokubun, "Vertically coupled micro-ring resonator filter for integrated Add/Drop node," (Invited Paper), IEICE Trans. on Electronics (Special Issue on Optical Signal-Processing Devices for Photonic Networks), vol.E88C, no.3, pp.349-362, March 2005. DOI: 10.1143/JJAP.44.1792

Y. Kokubun, S. Yoneda and S. Matsuura, "Athermal narrow-band optical filter at 1.55 μm wavelength by silica-based athermal waveguide," IEICE Trans. on Electronics, vol.E-81C, no.8, pp.1187-1194, Aug. 1998.

N. Yamaguchi, Y. Kokubun and K. Sato, "Low loss spot size transformer by dual tapered waveguides (DTW-SST)," J. Lightwave Tech., vol.8, no.4, pp.587-594, Apr. 1990. DOI: 10.1109/50.50765

M. A. Duguay, Y. Kokubun, T. L. Koch and L. Pfeiffer, "Antiresonant reflecting optical waveguides in SiO2-Si multilayer structures," Appl. Phys. Lett., vol.49, no.1, pp.13-15, July 1986.

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