Researcher Database

（Last updated : 2023-02-23 18:28:58）

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TAKIGUCHI Koichi

Department / Course College of Science and Engineering Department of Electrical and Electronic Engineering

Title / Position Professor

Other Affiliations
1.	Graduate School of Science and Engineering

Academic background
1.	1989/04～1992/03	Doctorial Course │ Department of Electrical Engineering │ Graduate School of Engineering │ The University of Tokyo │ Completed Ph.D.
2.	1987/04～1989/03	Master Course │ Department of Electrical Engineering │ Graduate School of Engineering │ The University of Tokyo │ Completed
3.	1983/04～1987/03	Department of Electronic Engineering │ Faculty of Engineering │ The University of Tokyo │ Graduated

Committee and society
1.	2022/07/14 ～ 2023/11	IEICE Transactions on Electronics, Joint Special Section on Opto-electronics and Communications for Future Optical Network Guest Associate Editors
2.	2010/12 ～ 2023/01	IEEE Photonics Technology Letters (PTL) Associate Editor

Research activities
1.		The Institute of Electrical and Electronics Engineers (IEEE)
2.		OPTICA (Formerly OSA)
3.		The International Society for Optical Engineering
4.		The Institute of Electronics, Information and Communication Engineers (IEICE)
5.		The Japan Society of Applied Physics (JSAP)

Subject of research
1.	Research on Integrated-photonic Functional Device
2.	Research on Optical Signal Processing
3.	Research on Optical Sensing
4.	Research on THz-wave Wireless Communication and Sensing Utilizing Photonics

Research summary
Optical signal processing technology, integrated optical device technology and their application to communications and sensing Progress in capacity enlargement of optical communication technologies has continued to bring various benefits to our lives, such as the broadbanding of the internet. However, existing signal processing in electronic circuits face problems in limitation of speed, increase in power consumption, etc. Studies will progress for various optical filters and optical signal processing technologies to be used in optical waveguides and optical fibers, using diffraction, interference, and non-linear optical effects that enable light to be processed as much as possible in the form of light as it is, with their high velocity and low power consumption characteristics. In addition, another is the soft probe aspect of light, which is gentle to living bodies and environment as well as being highly sensitive. By combining these features with optical signal processing technology, research will be made also for high-sensitivity optical sensing technology and for multiplexing of optical sensors (sensorfusion) mainly in biotechnology, medical, and environmental areas.

Present specialized field
Applied Optics/Quantum Optical Engineering, Electronic materials/ Electric materials, Electron device/ Electronic equipment, Communication/ Network engineering, Measurement Engineering (Keyword：Optoelectronics, Optical Communication, Optical Metrology, Information Photonics, Optical Signal Processing, Integrated-photonic Functional Device, Optical Waveguide, THz-wave Photonics)

Books
1.	1989/09	Optical fiber sensors, Bias of an optical passive ring-resonator gyro due to the misalignment of the polarization axis in the resonator formed by the polarization-maintaining fiber │ ,pp.94-100 (Co-authored)

Papers
1.	2022/08	Pulse amplitude modulation wireless communication in 300 GHz-band employing integrated-optic interferometer-based signal emulator │ OPTICA Optics Continuum │ 1 (8),pp.1741-1751 (Co-authored)
2.	2022/03	Direct demultiplexing method of terahertz-wave multiple carrier channels in terahertz domain utilizing terahertz-wave asymmetric interferometer │ SPIE Proceedings │ 12000,pp.120000O-1-120000O-5 (Co-authored)
3.	2022/03	Pulse amplitude modulation communication in terahertz-band using asymmetric Mach-Zehnder interferometer-type optical signal emulator │ SPIE Proceedings │ 12000,pp.120000D-1-120000D-5 (Co-authored)
4.	2021/08	Gate-free integrated-optic tunable filter for demultiplexing various capacity optical OFDM signals │ OSA Continuum │ 4 (8),pp.2319-2329 (Co-authored)
5.	2021/03	Terahertz-wave Nyquist wavelength division multiplexing communication utilizing integrated-optic spectrum synthesizer │ SPIE Proceedings │ 11685,pp.116850M-1-116850M-5 (Sole-authored)
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Academic conference presentation
1.	2023/03/08	Multi-input and output integrated optic filter for optical OFDM signal add/drop multiplexing (IEICE General Conference)
2.	2023/03/06	Fully passive integrated-optic chromatic dispersion compensator and its use to PAM4 signal compensation (OFC2023)
3.	2023/01/31	Integrated-optic chromatic dispersion compensator composed of arrayed-waveguide gratings and delay lines (Photonics West 2023)
4.	2022/09/06	Direct demultiplexing method of THz-wave multi-carrier signal in THz-domain (IEICE Society Conference)
5.	2022/08/01	Spectrally efficient THz-wave multi-carrier wireless communication using THz-domain Fourier transformation-type demultiplexer (CLEO Pacific Rim 2022)
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Winning science prize
1.	2022/11	The Institute of Electrical and Electronics Engineers (IEEE) IEEE Photonics Technology Letters, Associate Editor Service Award
2.	2019/06	The Institute of Electronics, Information and Communication Engineers (IEICE) Best Paper Award (Demultiplexing method of variable capacity optical OFDM signal using time lens-based optical Fourier transform)
3.	2014/03	The Institute of Electronics, Information and Communication Engineers (IEICE) Electronics Society Activity Testimonial
4.	2011/03	The Institute of Electronics, Information and Communication Engineers (IEICE) Electronics Society Activity Testimonial
5.	1997/10	The Institution of Electrical Engineers (IEE) Electronics Letters, Premium Award (1 Tbit/s (100 Gbit/s x 10 channel) OTDM/WDM transmission using a single supercontinuum WDM source)

Acquisition patent
1.		Dispersion slope equalizer （第1094625号）
2.		Dispersion slope equalizer （第1689101号）
3.		CDMA encoder-decoder, CDMA communication system, WDM-CDMA communication system （第2330185号）
4.		CDMA encoder-decoder, CDMA communication system, WDM-CDMA communication system （第1710938号）
5.		Optical pulse pattern generator （第2415564号）
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E-Mail Address

researchmap Researcher code
7000006085