Information and Communication Sciences
Profile Information
- Affiliation
- Professor, Faculty of Science and Technology, Department of Information and Communication Sciences, Sophia University(Concurrent)Chairperson of the Department of Information and communication Science
- Degree
- Bachelor of Engineering(Mar, 1986, Tohoku University)Master of Engineering(Mar, 1988, Tohoku University)Ph.D(Mar, 1997, Tohoku University)
- Researcher number
- 40500468
- J-GLOBAL ID
- 201301016462743143
- researchmap Member ID
- 7000004741
- External link
1986-1987 Tohoku University, Research on material characterization using ultrasonic wave
1988-2012 NTT Photonics Laboratories, Research on integrated-optic waveguide devices for optical commnication
2013- Now Dept. Information and Communication, Sophia Univ., Research on ultrafast optical communication
Research Interests
4Research Areas
1Research History
7-
Apr, 2010 - Mar, 2013
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Apr, 2004 - Mar, 2010
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May, 2001 - Mar, 2004
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Nov, 1997 - Apr, 2001
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Mar, 1995 - Oct, 1997
Education
2-
Apr, 1986 - Mar, 1988
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Apr, 1982 - Mar, 1986
Committee Memberships
26-
Nov, 2021 - Present
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Apr, 2015 - Present
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Apr, 2014 - Present
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Apr, 2014 - Present
Awards
16-
Mar, 2019
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Mar, 2014
Papers
259-
International Topical Meeting on Microwave Photonics (MWP2020), P.8, Nov, 2020 Peer-reviewedLead author
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The 22nd Microoptics Conference (MOC2017), E-4, Nov 19, 2017 Peer-reviewed
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IEICE ELECTRONICS EXPRESS, 14(10) 1-6, May, 2017 Peer-reviewedWe propose a compact polarization diversity circuit for a silicon waveguide device. It consists of silica waveguides and photonic crystal waveplates, and can convert input light with various polarization states into two output light signals with the same polarization. Setting these circuits at the front and rear of two silicon optical switches, the polarization dependence in the switch can be dramatically suppressed. We fabricated polarization diversity circuits for a 4x4 silicon optical switch and realized a polarization insensitive 4x4 optical switch. The polarization dependent loss was reduced to 1.1 dB and the polarization dependent crosstalk was less than - 17 dB.
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Journal of Lightwave Technology, 34(16) 3796-3802, Jun 29, 2016 Peer-reviewed
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Meeting Abstracts of the Physical Society of Japan, 71 648-648, 2016
Misc.
153-
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 117(196) 39-44, Aug 31, 2017
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Proceedings of the Society Conference of IEICE, 2015(1) 111-111, Aug 25, 2015
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Technical report of IEICE. OPE, 113(263) 9-12, Oct 24, 2013We designed and fabricated an integrated 1×4 wavelength selective switch using a silica planar light wave circuit. The channel spacing is 100 GHz and the number of channels is 40. Signal switching experiments show the switch to be error-free and have low power penalty bit-error rate performance.
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Technical report of IEICE. LQE, 113(264) 9-12, Oct 24, 2013We designed and fabricated an integrated 1×4 wavelength selective switch using a silica planar light wave circuit. The channel spacing is 100 GHz and the number of channels is 40. Signal switching experiments show the switch to be error-free and have low power penalty bit-error rate performance.
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Proceedings of the Society Conference of IEICE, 2013(1) 144-144, Sep 3, 2013
Books and Other Publications
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CRC Press, Sep, 2005 (ISBN: 9780824724252)Handbook of integrated optics
Presentations
31Research Projects
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科学研究費助成事業 基盤研究(C), 日本学術振興会, Apr, 2022 - Mar, 2025
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総務省, Jul, 2018 - Mar, 2021
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Apr, 2017 - Mar, 2020
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研究成果最適展開支援プログラム（A-STEP）, 科学技術振興機構（JST）, Jan, 2015 - Dec, 2015
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CREST, 科学技術振興機構（JST）, 2006 - 2010