Researcher Profile and Settings

Researcher

• Name

  CHIBA Akito

Affiliation

• Department of Electronics and Infomatics，Mathematics and Physics, Associate Professor

Profile and Settings

• Name

  Chiba, Akito

ホームページ

• URI

  https://chiba.ei.st.gunma-u.ac.jp/

Foreign language

• Use in presentation

  English

• Use in publication

  English

Affiliation

• Gunma University

Affiliation

• Affiliation

  Graduate School of Science and Technology

• Job title

  Assistant Professor

Education

• 2002, 2005, Hokkaido University, Graduate School of Engineering, Ph. D. Course, Division of Electronics and informatics (Optical Physics)
• 2000, 2002, Hokkaido University, Graduate School of Engineering, Master Course, Division of Electronic and Information Engineering (Optical Physics)
• 2000, Hokkaido University, School of Engineering, Electric and Precision Engineering

Degree

• Ph.D.
• Master of Engineering
• Bachelor of Engineering

Association Memberships

• The Optical Society
• IEEE Photonics Society
• Japan Society of Applied Physics
• Optical Society of Japan
• The Institute of Electronics, Information and Communication Engineers

Research Experience

• 2011, 9999, Gunma University, Graduate school of Engineering (Graduate school of Science and Technology; From 2014-)
• 2018, 2018, Univ. of California, Los Angeles
• 2014, 2020, National Institute of Information and Communications Technology, Lecturer
• 2010, 2011
• 2005, 2010, National Institute of Information and Communications Technology

Actual results of the joint research and commissioned research

• Aug. 2014, Mar. 2015

Research Activities

Research Areas

• Nanotechnology/Materials, Optical engineering and photonics
• Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Communication and network engineering
• Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Electronic devices and equipment

Research Interests

• Optical Communication
• Optical Physics
• Optical Measurement and Applied Optics

Published Papers

• Multiple-Frequency-Spaced and -Offset Flat Optical Comb Generation Using Multiple-Parallel Phase Modulator: Theory and Design, T. Sakamoto and A. Chiba, 01 Jun. 2022, Journal of the Optical Society of America B, 39, 6, 1644, 1654, Scientific journal
• Wavelength-tunable optical two-tone signals generated using single Mach-Zehnder optical modulator in single polarization-mode Sagnac interferometer, Akito Chiba, Yosuke Akamatsu, 17 Mar. 2022, Photonics, 9, 3, 194-1, 194-12, Scientific journal
• Complex amplitude estimation of monochromatic radio-frequency signal using frequency down conversion via direct detection of interfered optical phase-modulation signals, Akito Chiba, Yusuke Sunaga, Jun. 2021, OPTICS LETTERS, 46, 11, 2646, 2649, Scientific journal
• Multiple-frequency-spaced flat optical comb generation using a multiple-parallel phase modulator, Takahide Sakamoto, Akito Chiba, Nov. 2017, OPTICS LETTERS, 42, 21, Scientific journal

  DOI
• Long-term stable 60 GHz optical two-tone signal by destructive optical interference obtained from RF phase adjustment, A. Chiba,Y. Akamatsu,K. Takada, Apr. 2016, ELECTRONICS LETTERS, 52, 9, 736, 737, Scientific journal

  DOI
• RF frequency sextupling via an optical two-tone signal generated from two modulation lightwaves from one Mach-Zehnder optical modulator., Chiba A,Akamatsu Y,Takada K, Oct. 2015, Optics express, 23, 20, 26259, 26267, Scientific journal

  DOI
• Optical two-tone signal generation without use of optical filter for photonics-assisted radio-frequency quadrupling., Chiba A,Akamatsu Y,Takada K, Aug. 2015, Optics letters, 40, 15, 3651, 3654, Scientific journal

  DOI
• RF frequency quadrupling utilizing selective polarization rotation for wavelength-free radio-over-fiber, Y.Akamatsu,A. Chiba,K. Takada, Mar. 2015, Proc. OFC/NFOEC 2015, 2015, 1, 1, 3

  DOI
• Adjustment of optical path-length difference of nested Mach-Zehnder structure utilizing optical phase shift in waveguide junction, Akito Chiba,Tetsuya Kawanishi,Takahide Sakamoto,Kaoru Higuma,Kazumasa Takada,Masayuki Izutsu, 2014, 2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), International conference proceedings
• Low-Crosstalk Balanced Bridge Interferometric-Type Optical Switch for Optical Signal Routing, Chiba, Akito;Kawanishi, Tetsuya;Sakamoto, Takahide;Higuma, Kaoru;Takada, Kazumasa;Izutsu, Masayuki, Nov. 2013, IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 19, 6, 3400307-1, 3400307-5, Scientific journal

  DOI
• Amorphous silicon nitride thin films implanted with cerium ions for cathodoluminescent light source, A. Chiba,S. Tanaka,W. Inami,A. Sugita,K. Takada,Y. Kawata, Sep. 2013, Optical Materials, 35, 11, 1887, 1889

  DOI
• Spectral noise due to measurement errors of Mach-Zehnder interferometer optical path phases in a complex Fourier-transform integrated-optic spatial heterodyne spectrometer, K. Takada,M. Seino,A. Chiba,K. Okamoto, Jun. 2013, Optics Communicatons, 296, 61, 64

  DOI
• Detailed calculation of spectral noise caused by measurement errors of Mach-Zehnder interferometer optical path phases in a spatial heterodyne spectrometer with a phase shift scheme., Takada K,Seino M,Chiba A,Okamoto K, Apr. 2013, Applied optics, 52, 12, 2555, 2563

  DOI
• Dynamic and high-resolution live cell imaging by direct electron beam excitation, Y. Nawa,W. Inami,A. Chiba,A. Ono,A. Miyakawa,Y. Kawata,S. Lin,S. Terakawa, Feb. 2012, Optics Express, Vol.20, No. 5, pp. 5629-5635.

  DOI
• Synthesis of 16 Quadrature Amplitude Modulation Using Polarization-Multiplexing QPSK Modulator, Isao Morohashi,Takahide Sakamoto,Masaaki Sudo,Atsushi Kanno,Akito Chiba,Junichiro Ichikawa,Tetsuya Kawanishi, Jul. 2011, IEICE TRANSACTIONS ON COMMUNICATIONS, E94B, 7, 1809, 1814, Scientific journal

  DOI
• 90 Gbaud NRZ-DP-DQPSK Modulation with Full-ETDM Technique Using High-Speed Optical IQ Modulator, Atsushi Kanno,Takahide Sakamo,Akito Chiba,Masaaki Sudo,Kaoru Higuma,Junichiro Ichikawa,Tetsuya Kawanishi, Jul. 2011, IEICE TRANSACTIONS ON ELECTRONICS, E94C, 7, 1179, 1186, Scientific journal

  DOI
• 75-km SMF Transmission of Optical 16 QAM Signal Generated by a Monolithic Quad-Parallel MachZehnder Optical Modulator, Akito Chiba,Takahide Sakamoto,Tetsuya Kawanishi,Kaoru Higuma,Masaaki Sudo,Junichiro Ichikawa, Jul. 2011, IEEE PHOTONICS TECHNOLOGY LETTERS, 23, 14, 977, 979, Scientific journal

  DOI
• Reconfigurable multilevel transmitter using monolithically integrated quad Mach-Zehnder IQ modulator for optical 16-QAM and 8-PSK generation, Guo-Wei Lu,Takahide Sakamoto,Akito Chiba,Tetsuya Kawanishi,Tetsuya Miyazaki,Kaoru Higuma,Masaaki Sudo,Junichiro Ichikawa, Mar. 2011, OPTICS EXPRESS, 19, 6, 5596, 5601, Scientific journal

  DOI
• Phase Division Analysis for Intradyne Coherent Detection in Nonlinear Regime, T. Sakamoto,A. Chiba,T. Kawanishi, Mar. 2011, Proc. OFC/NFOEC 2011, 2011, 1
• Coherent Synthesis of Optical Multilevel signals by Electro-Optic Digital-to-Analog Conversion using Multi-Parallel Modulator (INVITED PAPER), T. Sakamoto,A. Chiba, Oct. 2010, IEEE Journal of selected topics in quantum electronics, Vol. 16, No.5, 1140, 1149

  DOI
• 16-QAM Transmitter using Monolithically Integrated Quad Mach-Zehnder IQ Modulator, G.-W. Lu,T. Sakamoto,A. Chiba,T. Kawanishi,T. Miyazaki,K. Higuma,M. Sudo,J. Ichikawa, Sep. 2010, Proc. ECOC2010, 2010, 1, Mo.1.F.3, pp. 1-2

  DOI
• 16 QAM Synthesis by Angular Superposition of Polarization using Dual-Polarization QPSK Modulator, I. Morohashi,M. Sudo,T. Sakamoto,A. Kanno,A. Chiba,J. Ichikawa,T. Kawanishi, Sep. 2010, Proc. ECOC 2010, 2010, 1, P3.14, pp. 1-2

  DOI
• Real-Time Homodyne Reception of 40-Gb/s BPSK Signal by Digital Optical Phase-Locked Loop, T. Sakamoto,A. Chiba,A. Kanno,I. Morohashi,T. Kawanishi, Sep. 2010, Proc. ECOC 2010, 2010, 1, P3.12, pp. 1-2

  DOI
• 95-Gb/s NRZ-DPSK Modulation with Full-ETDM Technique, A. Kanno,T. Sakamoto,A. Chiba,T. Kawanishi,M. Sudo,K. Higuma,J. Ichikawa, Sep. 2010, Proc. ECOC 2010, 2010, 1, Mo.2.F.5, pp.1-2

  DOI
• 166 Gb/s PDM-NRZ-DPSK Modulation Using Thin-LiNbO3-Substrate Modulator, A. Kanno,T. Sakamoto,A. Chiba,T. Kawanishi,K. Higuma,M. Sudou,J. Ichikawa, Sep. 2010, Proc. OFC/NFOEC 2010, 2010, 1, 1, 3

  DOI
• Coherent Demodulation of 10-Gb/s Optical Minimum-Shift Keying, T. Sakamoto,G.-W. Lu,A. Chiba,T. Kawanishi, Sep. 2010, Proc. OFC/NFOEC 2010, 2010, 1, 1, 3

  DOI
• 80-Gb/s Optical MSK Generation Using a Monolithically Integrated Quad-Mach-Zehnder IQ Modulator, G.-W. Lu,T. Sakamoto,A. Chiba,T. Kawanishi,T. Miyazaki,K. Higuma,J. Ichikawa, Sep. 2010, Proc. OFC/NFOEC 2010, 2010, 1, 1, 3

  DOI
• 95-Gb/s NRZ-DPSK Modulation with Full-ETDM Technique, A. Kanno,T. Sakamoto,A. Chiba,T. Kawanishi,M. Sudo,K. Higuma,J. Ichikawa, Sep. 2010, Proc. ECOC 2010, 2010, 1
• Real-Time Homodyne Reception of 40-Gb/s BPSK Signal by Digital Optical Phase-Locked Loop, T. Sakamoto,A. Chiba,A. Kanno,I. Morohashi,T. Kawanishi, Sep. 2010, Proc. ECOC 2010, 2010, 1
• 16 QAM Synthesis by Angular Superposition of Polarization using Dual-Polarization QPSK Modulator, I. Morohashi,M. Sudo,T. Sakamoto,A. Kanno,A. Chiba,J. Ichikawa,T. Kawanishi, Sep. 2010, Proc. ECOC 2010, 2010, 1
• 16-QAM Transmitter using Monolithically Integrated Quad Mach-Zehnder IQ Modulator, G.-W. Lu,T. Sakamoto,A. Chiba,T. Kawanishi,T. Miyazaki,K. Higuma,M. Sudo,J. Ichikawa, Sep. 2010, Proc. ECOC2010, 2010, 1
• 120-Gb/s NRZ-DQPSK signal generation by a thin-lithium-niobate-substrate modulator., Atsushi Kanno,Takahide Sakamoto,Akito Chiba,Tetsuya Kawanishi,Kaoru Higuma,Masaaki Sudou,Junichiro Ichikawa, Jul. 2010, IEICE Electronic Express, 7, 11, 817, 822

  DOI
• Monolithically integrated Quad Mach-Zehnder IQ Modulator for Optical 16-QAM Generation, G.-W. Lu,T. Sakamoto,A. Chiba,T. Kawanishi,T. Miyazaki,K. Higuma,M. Sudo,J. Ichikawa, May 2010, Proc. CLEO/IQEC 2010, 2010, PDP, 1, 2

  DOI
• Digital Optical Phase Locked Loop for Real-Time Coherent Demodulation of Multilevel PSK/QAM, T. Sakamoto,G.-W. Lu,A. Chiba,T. Kawanishi, Mar. 2010, Proc. OFC/NFOEC 2010, 2010, 1, 1, 3

  DOI
• 80-Gb/s Optical MSK Generation Using a Monolithically Integrated Quad-Mach-Zehnder IQ Modulator, G.-W. Lu,T. Sakamoto,A. Chiba,T. Kawanishi,T. Miyazaki,K. Higuma,J. Ichikawa, Mar. 2010, Proc. OFC/NFOEC 2010, 2010, 1
• Coherent Demodulation of 10-Gb/s Optical Minimum-Shift Keying, T. Sakamoto,G.-W. Lu,A. Chiba,T. Kawanishi, Mar. 2010, Proc. OFC/NFOEC 2010, 2010, 1
• 166 Gb/s PDM-NRZ-DPSK Modulation Using Thin-LiNbO3-Substrate Modulator, A. Kanno,T. Sakamoto,A. Chiba,T. Kawanishi,K. Higuma,M. Sudou,J. Ichikawa, Mar. 2010, Proc. OFC/NFOEC 2010, 2010, 1
• 16-level quadrature amplitude modulation by monolithic quad-parallel Mach-Zehnder optical modulator, A. Chiba,T. Sakamoto,T. Kawanishi,K. Higuma,M. Sudou,J. Ichikawa, Feb. 2010, Electronics letters, Vol. 46, No. 3, 220, 221

  DOI
• Interview: Integrated optical modulation devices open the door for optical communication being close to the Shannon limit, A. Chiba, Feb. 2010, Electronics Letters, Vol. 46, No. 3

  DOI
• Optical trellis-coded modulation with multi-parallel MZM, T. Sakamoto,A. Chiba,I.Morohashi,T. Kawanishi, Sep. 2009, Proc. ECOC2009, 2009, 1, P3.17, pp. 1-2
• High-speed DBPSK signal generation by low-Vπ modulator using thin LiNbO3 substrate, A. Kanno,T. Sakamoto,A. Chiba,T. Kawanishi,K. Higuma,M. Sudou,J. Ichikawa, Sep. 2009, Proc. ECOC2009, 2009, 1, P2.09, pp.1-2
• Optical MSK Transmitter using a Monolithically Integrated Quad Mach-Zehnder IQ Modulator, G.-W. Lu,T. Sakamoto,A. Chiba,T. Kawanishi,T. Miyazaki,K. Higuma,J. Ichikawa, Sep. 2009, Proc. ECOC2009, 2009, 1, No. 5.2.1, pp. 1-2
• Optical minimum-shift-keying transmitter based on a monolithically integrated quad Mach-Zehnder in-phase and quadrature modulator., G. -W. Lu,T. Sakamoto,A. Chiba,T. Kawanishi,T. Miyazaki,K. Higuma,J. Ichikawa, Jul. 2009, Optics Letters, 34, 14, 2144, 2146, Scientific journal

  DOI
• Integrated Lithium Niobate Mach-Zehnder interferometers for advanced modulation formats (Invited paper), T. Kawanishi,T. Sakamoto,A. Chiba, Jul. 2009, IEICE Trans. Electronics, E92-C, No. 7, 915, 921

  DOI
• Analysis of crosstalk impact on optical packet signals in an optical cross-bar switch by intensity-trimming method, A. Chiba,T. Kawanishi,T. Sakamoto,K. Higuma,M. Izutsu, Mar. 2009, Proc. OFC/NFOEC 2009, 2009, 1, 1, 3

  DOI
• Electro-optic synthesis of 8PSK by quad-parallel Mach-Zehnder modulator, T. Sakamoto,A. Chiba,T. Kawanishi, Mar. 2009, Proc. OFC/NFOEC 2009, 2009, 3, 1, 3

  DOI
• High-bit-rate optical QAM (invited), T. Sakamoto,A. Chiba,T. Kawanishi, Mar. 2009, Proc. OFC/NFOEC 2009, 2009, 1, 1, 3

  DOI
• Guard-time-free port selection by a LiNbO3 optical switch embedded intensity trimmers for optical packet switching, A. Chiba,T. Kawanishi,T. Sakamoto,K. Higuma,M. Izutsu, Mar. 2009, Proc. OFC/NFOEC 2009, 2009, 3, 1, 3

  DOI
• Electro-optic synthesis of 8PSK by quad-parallel Mach-Zehnder modulator, T. Sakamoto,A. Chiba,T. Kawanishi, Mar. 2009, Proc. OFC/NFOEC 2009, 2009, 3
• Advances and challenges in vector modulation technologies (INVITED), Kawanishi Tetsuya,Sakamoto Takahide,Chiba Akito, Jan. 2009, SPIE Proceeding: BROADBAND ACCESS COMMUNICATION TECHNOLOGIES III, 7234, International conference proceedings

  DOI
• Adaptive threshold adjustment for signal-distortion-free digital-coherent optical demodulation system, Chiba A,Sakamoto T,Kawanishi T, Dec. 2008, Optics express, 16, 26, 21647, 21655

  DOI
• Crosstalk suppression of a balanced bridge interferometric type LiNbO3 optical switch by using Mach-Zehnder structures, A. Chiba,T. Kawanishi,T. Sakamoto,K. Higuma,M. Izutsu, Oct. 2008, IEEE Photonics Technology Letters, Vol. 20, No. 10, 872, 874

  DOI
• 50-km SMF transmission of 50-Gb/s 16 QAM generated by quad-parallel MZM, T. Sakamoto,A. Chiba,T. Kawanishi, Sep. 2008, Proc. ECOC2008, 2008, 1, Tu.1.E.3, pp. 1-2
• Simple, low fluctuation voltage signal generation for 8-Gb/s quadrature amplitude modulation using dual-parallel Mach-Zehnder modulator., Akito Chiba,Takahide Sakamoto,Tetsuya Kawanishi,Masayuki Izutsu, Jul. 2008, IEICE Electronic Express, 5, 14, 497, 502

  DOI
• High-speed dual-parallel Mach-Zehnder modulator using thin lithium niobate substrate, T. Kawanishi,T. Sakamoto,A. Chiba,M. Izutsu,K. Higuma,J. Ichikawa,T. Lee,V. Filsinger, Mar. 2008, Proc. OFC/NFOEC 2008, 2008, 1, 1, 3

  DOI
• Duobinary signal generation using high-extinction ratio modulation, T. Kawanishi,T. Sakamoto,A. Chiba,M. Izutsu,P.J. Winzer, Feb. 2008, Proc. OFC/NFOEC 2008, 2008, 1
• Adaptive symbol discrimination method for distorted multi-level optical signal and its application to decoding of high-speed optical quadrature amplitude modulation, A. Chiba,T. Sakamoto,T. Kawanishi, Feb. 2008, Proc. OFC/NFOEC 2008, 2008, 1
• High-speed dual-parallel Mach-Zehnder modulator using thin lithium niobate substrate, T. Kawanishi,T. Sakamoto,A. Chiba,M. Izutsu,K. Higuma,J. Ichikawa,T. Lee,V. Filsinger, Feb. 2008, Proc. OFC/NFOEC 2008, 2008, 1
• Study of precise optical modulation using Mach-Zehnder interferometers for advanced modulation formats, T. Kawanishi,T. Sakamoto,A. Chiba,M. Izutsu, Sep. 2007, Proc. ECOC2007, 2007, 1, 6.2.3, pp. 1-2, International conference proceedings
• 50-Gb/s 16 QAM by a quad-parallel Mach-Zehnder modulator (Post-Deadline Paper), T. Sakamoto,A. Chiba,T. Kawanishi, Sep. 2007, Proc. ECOC2007, 2007, PDP, 1, 3, International conference proceedings
• Study of precise optical modulation using Mach-Zehnder interferometers for advanced modulation formats, T. Kawanishi,T. Sakamoto,A. Chiba,M. Izutsu, Sep. 2007, Proc. ECOC2007, 2007, 1, International conference proceedings
• Advanced LiNbO3 modulation (Invited), T. Kawanishi,T. Sakamoto,A. Chiba,M. Izutsu, May 2007, Proc. CLEO/IQEC 2007, 2007, 1, 1, 3
• CPFSK/MSK Modulation with a Monolithic Integrated LiNbO3 Modulator, T. Sakamoto,A. Chiba,T. Kawanishi,M. Izutsu, Mar. 2007, Proc. OFC/NFOEC 2007, 2007, 1, 1, 3, International conference proceedings

  DOI
• Fano resonance in a multimode tapered fiber coupled with a microspherical cavity, Akito Chiba, Hideki Fujiwara, Jun-ichi Hotta, Shigeki Takeuchi, Keiji Sasaki, Jun. 2005, Applied Physics Letters, 86, 26, 261106-1, 261106-3, Scientific journal

  DOI
• Resonant frequency control of a microspherical cavity by temperature adjustment, A Chiba,H Fujiwara,JI Hotta,S Takeuchi,K Sasaki, Sep. 2004, JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 43, 9A, 6138, 6141, Scientific journal

  DOI
• Zero-crossing steps in overdamped Josephson junctions, A. Takada,A. Chiba,T. Noguchi, Jun. 2000, Inst. Phys. Conf. Ser., Vol. 167, 205, 208
• Spectral noise due to measurement errors of Mach-Zehnder interferometer optical path phases in a complex Fourier-transform integrated-optic spatial heterodyne spectrometer, Takada, Kazumasa;Seino, Mitsuyoshi;Chiba, Akito;Okamoto, Katsunari, 2013, OPTICS COMMUNICATIONS, 296, 61, 64

  DOI
• Amorphous silicon nitride thin films implanted with cerium ions for cathodoluminescent light source, Chiba, Akito;Tanaka, Shinnosuke;Inami, Wataru;Sugita, Atsushi;Takada, Kazumasa;Kawata, Yoshimasa, 2013, OPTICAL MATERIALS, 35, 11, 1887, 1889

  DOI

MISC

• 100 Gbps NRZ-DPSK signal generation using high-speed and low-Vπ LN modulator, KANNO Atsushi,SAKAMOTO Takahide,CHIBA Akito,KAWANISHI Tetsuya,HIGUMA Kaoru,SUDOU Masaaki,ICHIKAWA Junichiro, 21 Jan. 2010, Technical report of IEICE. OCS, 109, 400, 89, 92
• Development of high-speed LiNbO3 optical modulator for over 100 Gb/s transmission, KANNO ATSUSHI,SAKAMOTO TAKAHIDE,CHIBA AKITO,KAWANISHI TETSUYA,HIGUMA KAORU,SUDO MASAAKI,ICHIKAWA JUN'ICHIRO, 13 Aug. 2009, 電子情報通信学会技術研究報告, 109, 173(EMD2009 26-58), 13-16
• 160 Gb/s full-ETDM NRZ-DQPSK modulation by a broadband optical IQ modulator, KANNO Atsushi,SAKAMOTO Takahide,CHIBA Akito,KAWANISHI Tetsuya,SUDOU Masaaki,HIGUMA Kaoru,ICHIKAWA Junichiro, 22 Jul. 2010, Technical report of IEICE. OPE, 110, 156, 37, 40
• C-3-70 80 Gb/s NRZ-DPSK modulation using a broadband and low Vπ modulator, Kanno Atsushi,Sakamoto Takahide,Chiba Akito,Kawanishi Tetsuya,Higuma Kaoru,Sudou Masaaki,Ichikawa Junichiro, 02 Mar. 2010, Proceedings of the IEICE General Conference, 2010, 1
• Electro-optic synthesis of high-speed optical multilevel signals, SAKAMOTO Takahide,CHIBA Akito,LU Guo-Wei,MOROHASHI Isao,KANNO Atsushi,KAWANISHI Tetsuya,SUDOU Masaaki,HIGUMA Kaoru,ICHIKAWA Junichiro, 22 Jul. 2010, Technical report of IEICE. OPE, 110, 156, 45, 50
• B-10-73 166-Gb/s NRZ-DP-DPSK optical modulation with full-ETDM technique, Kanno Atsushi,Sakamoto Takahide,Chiba Akito,Kawanishi Tetsuya,Sudo Masaaki,Higuma Kaoru,Ichikawa Junichiro, 31 Aug. 2010, Proceedings of the Society Conference of IEICE, 2010, 2
• ETDMによる166 Gb/s NRZ‐DP‐DPSK光変調, 菅野敦史,坂本高秀,千葉明人,川西哲也,須藤正明,日隈薫,市川潤一郎, 31 Aug. 2010, 電子情報通信学会大会講演論文集, 2010, 260
• 80Gb/s PDM 16QAM Generation by Polarization-Multiplexing QPSK Modulator, MOROHASHI Isao,SAKAMOTO Takahide,SUDO Masaaki,KANNO Atsushi,CHIBA Akito,ICHIKAWA Junichiro,HOSAKO Iwao,KAWANISHI Tetsuya, 2011, Annu Meet IEEE Photonic Soc, 2011, 765-766

  DOI
• C-3-27 Full-ETDM multi-level modulation using broadband optical IQ modulator, Kanno Atsushi,Sakamoto Takahide,Chiba Akito,Sudo Masaaki,Higuma Kaoru,Ichikawa Junichiro,Kawanishi Tetsuya, 28 Feb. 2011, Proceedings of the IEICE General Conference, 2011, 1
• 16 QAM Generation by Angular Superposition of Polarization Using Polarization-Multiplexing QPSK Modulator, MOROHASHI ISAO,SAKAMOTO TAKAHIDE,SUDO MASAAKI,KANNO ATSUSHI,CHIBA AKITO,ICHIKAWA JUN'ICHIRO,HOSAKO IWAO,KAWANISHI TETSUYA, 04 Jul. 2011, 電子情報通信学会技術研究報告, 111, 122(OCS2011 26-44), 63-66
• C-3-64 Quadruple RF generation using a high extinction-ratio optical modulator and a delayed interferometer, Toda Hiroyuki,Miyashita Junichi,Kiuchi Hitoshi,Chiba Akito,Sakamoto Takahide,Kawanishi Tetsuya,Tsuchiya Masahiro,Izutsu Masayuki, 05 Mar. 2008, Proceedings of the IEICE General Conference, 2008, 1
• Highly Pure 160-GHz Two-Tone Lightwave Generation using High Extinction-Ratio Optical Intensity Modulator and Delay Interferometer, TODA Hiroyuki,MIYASHITA Junichi,CHIBA Akito,SAKAMOTO Takahide,KAWANISHI Tetsuya,TSUCHIYA Masahiro,IZUTSU Masayuki, 17 Jul. 2008, IEICE technical report, 108, 155, 65, 67
• Measurement of Mach-Zehnder interferometer based modulators by using optical spectrum analysis, KAWANISHI Tetsuya,SAKAMOTO Takahide,CHIBA Akito,TODA Hiroyuki,ENOKIHARA Akira,MURATA Hiroshi, 16 Oct. 2008, IEICE technical report, 108, 259, 53, 58
• Ultra high extinction-ratio and ultra low chirp optical intensity modulation for pure two-tone lightwave signal generation, Tetsuya Kawanishi,Takahide Sakamoto,Akito Chiba,Masahiro Tsuchiya,Hiroyuki Toda, 15 Sep. 2008, 2008 Conference on Quantum Electronics and Laser Science Conference on Lasers and Electro-Optics, CLEO/QELS

  DOI
• Performance improvement of high-extinction-ratio LiNbO3optical intensity modulator by means of polarization crosstalk reduction, Hiroyuki Toda,Katsuya Fukuta,Daisuke Arai,Akito Chiba,Kiyotaka Sasagawa,Tetsuya Kawanishi,Masahiro Tsuchiya,Masayuki Izutsu, 01 Dec. 2007, MWP 2007 - 2007 IEEE International Topical Meeting on Microwave Photonics, 191, 193

  DOI
• Pure intensity modulated frequency doubled optical clock signal generation by using ultra low-chirp and high extinction-ratio optical modulation, Tetsuya Kawanishi,Takahide Sakamoto,Akito Chiba,Hiroyuki Toda,Hiroshi Murata,Akira Enokihara, 10 Nov. 2009, 2009 14th OptoElectronics and Communications Conference, OECC 2009

  DOI
• Highly pure 160-GHz two-tone lightwave generation using high extinction-ratio optical intensity modulator and delay interferometer, Hiroyuki Toda,Junichi Miyashita,Akito Chiba,Takahide Sakamoto,Tetsuya Kawanishi,Masahiro Tsuchiya,Masayuki Izutsu, 01 Dec. 2008, Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS, 421, 422

  DOI

Presentations

• Polarization manipulation utilizing negative-index optical modulation and its application., A. Chiba, ICCCAS2025, 25 May 2025, 23 May 2025, 25 May 2025, English, Wuhan University of Technology, Wuhan, China., China, International conference
• 2電極型 MZM を用いた RF 信号パラメータ推定のシミュレーション, 小野口怜, 千葉明人, 2024年電子情報通信学会ソサイエティ大会, 13 Sep. 2024, 10 Sep. 2024, 13 Sep. 2024, Japanese, Japan, Domestic conference
• RF parameter estimation assisted by phase modulation and detection of lightwave (INVITED), A. Chiba, ICCCAS2024, 12 May 2024, 10 May 2024, 12 May 2024, English, Xiamen, China, China, International conference
• RF Parameter Estimation Using Lightwave Modulation (INVITED), A. Chiba, 12th Conf. Communications, Circuits, and Systems 2023 (ICCCAS2023), 06 May 2023, 05 May 2023, 07 May 2023, English, SINGAPORE, Singapore, International conference
• RF signal estimation utilizing low-frequency beat signal due to harmonics of phase-modulation lightwave, Akito Chiba, Yusuke Sunaga, 15th Pacific Rim Conference on Lasers and Electro-Optics (CLEO-PR2022), 04 Aug. 2022, 31 Jul. 2022, 05 Aug. 2022, English, Sapporo, Hokkaido, Japan, International conference
• Multi-Frequency-Spaced Optical Comb Generation by Superposition of Purely Deeply Phase-Modulated Lights, Takahide Sakamoto, Akito Chiba, 2021 IEEE Photonics Conference (IPC), 18 Oct. 2021, 18 Oct. 2021, 21 Oct. 2021, English, Vancouver, BC, Canada, Canada, International conference
• Double frequency-spacing optical comb generation based on I-Q optical modulation (Invited), A. Chiba,T. Sakamoto, International Conference on Technology and Social Science 2019 (ICTSS 2019), 08 May 2019, English, Kiryu-shi, Gunma, Japan., Japan, International conference
• 電気光学効果を用いた光位相変調によるRFパラメータ計測の提案と実証, 須長祐介,千葉明人,高田和正, 電子情報通信学会光エレクトロニクス(OPE)研究会, 18 Jan. 2019, Japanese, Japan, Domestic conference
• Sextupled frequency-spacing optical two-tone signals using selective polarization-rotation by a negative-index modulation (INVITED), Akito Chiba,Yosuke Akamatsu,Kazumasa Takada, The 2018 International Conference on Sensor Networks and Signal Processing (SNSP 2018), 30 Oct. 2018, English, Xi`an, China., China, International conference
• Numerical analysis on double frequency spacing optical comb for optimization of RF signals driving I-Q MZM, A. Chiba, Y. Moteki, N. Kobayashi, T. Sakamoto and K. Takada, The 13th Pacific Rim Conference on Lasers and Electro-Optics, 03 Aug. 2018, English, Hong Kong, International conference
• Frequency Spacing and Offset Tunable Multiple-Frequency-Spaced Optical Comb Generation Using Multiple-Parallel Phase Modulator, T. Sakamoto and A. Chiba, The 13th Pacific Rim Conference on Lasers and Electro-Optics, 03 Aug. 2018, English, Hong Kong, International conference
• Generation of wide frequency-spacing optical two-tone signal utilizing polarization and optical phase shift induced by RF phase (Invited), A. Chiba,Y. Akamatsu,K. Takada, Progress In Electromagnetics Research Symposium 2018, 03 Aug. 2018, English, International conference
• Optical two-tone signal generation based on bidirectional optical modulation in one polarization mode of polarization-maintaining Sagnac interferometer (Invited), A. Chiba, International Conference on Mechanical, Electrical and Medical Intelligent System 2017, 30 Nov. 2017, English, International conference
• Proposal of RF phase measurement utilizing two-electrodes optical phase modulator and low-speed photodiode, Yusuke Sunaga, Akito Chiba, Kazumasa Takada, International Conference on Mechanical, Electrical and Medical Intelligent System 2017, 29 Nov. 2017, English, Japan, International conference
• 2 電極型単一MZM を用いた光変調によるRF 位相計測, 須長祐介、千葉明人、高田和正, Optics and Photonics Japan 2017 (OPJ2017), 01 Nov. 2017, Japanese, Japan, Domestic conference
• Phase measurement of high-frequency RF signal using optical phase modulation and frequency down conversion by photo mixing, Akito Chiba, Yusuke Sunaga, Kazumasa Takada, The 24th Congress of the International Commission for Optics (ICO-24),, 29 Aug. 2017, English, Keio Plaza Hotel, Tokyo, Japan., Japan, International conference
• Even/Odd Mode-Selective Double Frequency-Spaced Optical Comb Generation By Quad-Parallel Phase Modulator, T. Sakamoto and A. Chiba, The 22nd OptoElectronics and Communications Conference (OECC 2017), 03 Aug. 2017, English, Sands Expo and Convention Centre, Singapore
• Generation of wide frequency-spacing optical frequency comb composed of odd/even multiple harmonics, A. Chiba, N. Kobayashi, Y. Moteki, T. Sakamoto and K. Takada, 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR), 02 Aug. 2017, English, International conference
• Wavelength-independent optical two-tone signal generator composed of one single Mach-Zehnder optical modulator and a polarizer, Akito Chiba, Yosuke Akamatsu, Kazumasa Takada, 2016 IEEE Photonics Conference, 04 Oct. 2016, English, International conference
• RF Frequency Sextupling Utilizing a Single Mach-Zehnder Optical Modulator possessing external-load RF terminals, Akito Chiba, Yosuke Akamatsu, Kazumasa Takada, CLEO:2016, 05 Jun. 2016, English, International conference
• 偏光操作を用いる光2トーン信号生成における安定性の向上, 千葉 明人、赤松 洋介、高田 和正, 第63回応用物理学関係連合講演会, 21 Mar. 2016
• 変調度が異なる光波の合成と偏光操作により抽出された高次光側帯波の評価, 電子情報通信学会光エレクトロニクス(OPE)研究会, 2016
• RF frequency quadrupling utilizing selective polarization rotation for wavelength-free radio-over-fiber, Y.Akamatsu,A. Chiba,K. Takada, OFC/NFOEC 2015, 24 Mar. 2015, Los Angeles, CA, U.S.A.
• 光側帯波の偏光操作による6逓倍信号の生成, 第62回応用物理学会春季学術講演会, 2015
• Evaluation of Crosstalk in optical cross-bar switch driven by high-frequency signal, Akito Chiba,Kazumasa Takada,Kaoru Higuma,Tetsuya Kawanishi,Takahide Sakamoto,Masayuki Izutsu, 2014 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) AND THE 2014 9TH ASIA-PACIFIC MICROWAVE PHOTONICS CONFERENCE (APMP), Oct. 2014, English, International conference
• Evaluation of high-frequency region crosstalk in interferometric-type optical switch and its suppression using optical-intensity trimmer structures, CHIBA Akito;KAWANISHI Tetsuya;SAKAMOTO Takahide;HIGUMA Kaoru;TAKADA Kazumasa;IZUTSU Masayuki, IEICE-OPE Workshop, Jan. 2014
• Adjustment of optical path-length difference of nested Mach-Zehnder structure utilizing optical phase shift in waveguide junction, CLEO/IQEC 2014, 2014
• 偏光回転抑圧を利用する２波長光信号の生成と評価, 日本光学会年次学術講演会(OPJ2014), 2014
• MZIアレイ評価用炭酸ガスレーザ照射法の位相測定精度, 第61回応用物理学関係連合講演会, 2014
• Adjustment of optical path-length difference of nested Mach-Zehnder structure utilizing optical phase shift in waveguide junction, CLEO/IQEC 2014, 2014
• Evaluation of Crosstalk in optical cross-bar switch driven by high-frequency signal, 2014 International topical meeting on Microwave photonics, 2014
• Evaluation of high-frequency region crosstalk in interferometric-type optical switch and its suppression using optical-intensity trimmer structures, IEICE-OPE Workshop, 2014
• 希土類イオンを添加した窒化ケイ素薄膜の発光強度評価, 第59回応用物理学関係連合講演会, 2012
• 低コヒーレンス光干渉を用いたMZIアレイの位相誤差測定, 第59回応用物理学関係連合講演会, 2012
• 炭酸ガスレーザ照射によるMZIアレイの位相誤差測定, 第59回応用物理学関係連合講演会, 2012
• Luminescence Enhancement in an amorphous Silicon Nitride film by Cerium ion Implantation, 4th International Workshop on Photoluminescence in Rare Earths: Photonic Materials and Devices, 2012
• Luminescence Enhancement in an amorphous Silicon Nitride film by Cerium ion Implantation, 4th International Workshop on Photoluminescence in Rare Earths: Photonic Materials and Devices, 2012
• Phase Division Analysis for Intradyne Coherent Detection in Nonlinear Regime, T. Sakamoto,A. Chiba,T. Kawanishi, OFC/NFOEC 2011, JWA19, Mar. 2011, Los Angeles, U.S.A.
• 16 QAM Generation by Angular Superposition of Polarization Using Polarization-Multiplexing QPSK Modulator, IEICE OPE Workshop, 2011
• Nonlinear Distortion of 16QAM Constellations in Intradyne Coherent Receiver, CLEO/Europe-EQEC 2011, CI.P.5, 2011
• 広帯域光IQ変調器による全ETDM多値光変調(invited), 電子情報通信学会2011年総合大会、C-3-27（依頼講演）, 2011
• 16 QAM Generation by Angular Superposition of Polarization Using Polarization-Multiplexing QPSK Modulator, IEICE OPE Workshop, 2011
• Nonlinear Distortion of 16QAM Constellations in Intradyne Coherent Receiver, CLEO/Europe-EQEC 2011, CI.P.5, 2011
• 95-Gb/s NRZ-DPSK Modulation with Full-ETDM Technique, A. Kanno,T. Sakamoto,A. Chiba,T. Kawanishi,M. Sudo,K. Higuma,J. Ichikawa, 36th European Conference and Exhibition on Optical Communication (ECOC 2010), Mo.2.F.5, Sep. 2010, Torino, Itary
• Real-Time Homodyne Reception of 40-Gb/s BPSK Signal by Digital Optical Phase-Locked Loop, T. Sakamoto,A. Chiba,A. Kanno,I. Morohashi,T. Kawanishi, 36th European Conference and Exhibition on Optical Communication (ECOC 2010), P3.12, Sep. 2010, Torino, Itary
• 16 QAM Synthesis by Angular Superposition of Polarization using Dual-Polarization QPSK Modulator, I. Morohashi,M. Sudo,T. Sakamoto,A. Kanno,A. Chiba,J. Ichikawa,T. Kawanishi, 36th European Conference and Exhibition on Optical Communication (ECOC 2010), P3.14, Sep. 2010, Torino, Itary
• 16-QAM Transmitter using Monolithically Integrated Quad Mach-Zehnder IQ Modulator, G.-W. Lu,T. Sakamoto,A. Chiba,T. Kawanishi,T. Miyazaki,K. Higuma,M. Sudo,J. Ichikawa, 36th European Conference and Exhibition on Optical Communication (ECOC 2010), Mo.1.F.3, Sep. 2010, Torino, Itary
• 80-Gb/s Optical MSK Generation Using a Monolithically Integrated Quad-Mach-Zehnder IQ Modulator, G.-W. Lu,T. Sakamoto,A. Chiba,T. Kawanishi,T. Miyazaki,K. Higuma,J. Ichikawa, OFC/NFOEC 2010, OWN5, Mar. 2010, San Diego, U.S.A.
• Coherent Demodulation of 10-Gb/s Optical Minimum-Shift Keying, T. Sakamoto,G.-W. Lu,A. Chiba,T. Kawanishi, OFC/NFOEC 2010, JThA2, Mar. 2010, San Diego, U.S.A.
• 166 Gb/s PDM-NRZ-DPSK Modulation Using Thin-LiNbO3-Substrate Modulator, A. Kanno,T. Sakamoto,A. Chiba,T. Kawanishi,K. Higuma,M. Sudou,J. Ichikawa, OFC/NFOEC 2010, JWA40, Mar. 2010, San Diego, U.S.A.
• Digital Optical Phase Locked Loop for Real-Time Coherent Demodulation of Multilevel PSK/QAM, T. Sakamoto,G.-W. Lu,A. Chiba,T. Kawanishi, OFC/NFOEC 2010, OMS5, Mar. 2010, San Diego, U.S.A.
• 80-Gb/s Optical MSK Generation Using a Monolithically Integrated Quad-Mach-Zehnder IQ Modulator, G.-W. Lu,T. Sakamoto,A. Chiba,T. Kawanishi,T. Miyazaki,K. Higuma,J. Ichikawa, OFC/NFOEC 2010, OWN5, Mar. 2010, San Diego, U.S.A.
• 160-Gb/s Optical DQPSK Signal Generation Using a Thin-LiNbO3-Substrate Modulator with a Ridge-Type Optical Waveguide Structure, A. Kanno, T. Sakamoto, A. Chiba, T. Kawanishi, K. Higuma, M. Sudo, J. Ichikawa, CLEO/IQEC 2010, 2010, English
• 16-level Optical Quadrature Amplitude Modulation using Monolithic Quad-Parallel Mach-Zehnder Optical Modulator and Signal Transmission over 75-km Single-Mode Fiber, A. Chiba, T. Sakamoto, T. Kawanishi, K. Higuma, M. Sudou, J. Ichikawa, CLEO/IQEC 2010, 2010, English
• 160 Gb/s full-ETDM NRZ-DQPSK modulation by a broadband optical IQ modulator, IEICE-OPE Workshop, 2010
• Electro-optic synthesis of high-speed optical multilevel signals, IEICE-OPE Workshop, 2010
• モノリシック四並列光変調器による16値光直交振幅変調, 電子情報通信学会2010 年総合大会, 2010
• モノリシック4並列光変調器により生成した16値光直交振幅変調信号の75kmシングルモードファイバ伝送, 電子情報通信学会光エレクトロニクス(OPE)研究会, 2010
• モノリシック集積QPMZMによる光16QAM信号生成とその75kmSMF伝送, 電子情報通信学会2010年ソサイエティ大会, 2010
• Monolithically integrated Quad Mach-Zehnder IQ Modulator for Optical 16-QAM Generation (Postdeadline Paper), G.-W. Lu, T. Sakamoto, A. Chiba, T. Kawanishi, T. Miyazaki, K. Higuma, M. Sudo and J. Ichikawa, CLEO/IQEC 2010, May 2010, English, International conference
• 360-Gb/s NRZ-DP-DQPSK Modulation with Full-ETDM Technique, The 15th OptoElectronics and Communications Conference (OECC2010), 8B2-2, 2010
• 40Gb/s DP-NRZ-QPSK Signal Generation Using a Dual-Polarization Quad-Parallel Mach-Zehnder Modulator, The 15th OptoElectronics and Communications Conference (OECC2010), 8B2-3, 2010
• モノリシック光デバイス集積化技術の研究開発と超大容量光通信用デバイスへの応用（所属機関代表）, 科学・技術フェスタ in 京都2010（平成22年度産学官連携推進会議；内閣府主催）若手研究者による科学・技術説明会、C‐6, 2010
• 16 Quadrature Amplitude Modulation Using Polarization-Multiplexing QPSK Modulator, The 15th OptoElectronics and Communications Conference (OECC2010), 8B1-3, 2010
• Monolithically Integrated Quad Mach-Zehnder IQ Modulator for Generation of Advanced Optical Modulation Formats (invited), 9th international conference on optical communications and networks, 2010
• 高速・低VπLN変調器によるNRZ-ETDM方式超高速光変調技術(invited), 光通信インフラの飛躍的な高度化に関する時限研究専門委員会(EXAT) 2010年度11月研究会、No.1 （招待講演）, 2010
• コヒーレント合成に基づいた多値光信号生成を実現する集積光変調器(invited), 電子情報通信学会2010 年総合大会、BCS-1-6（依頼講演）, 2010
• 160-Gb/s Optical DQPSK Signal Generation Using a Thin-LiNbO3-Substrate Modulator with a Ridge-Type Optical Waveguide Structure, CLEO/IQEC 2010, CFL7, 2010
• 16-level Optical Quadrature Amplitude Modulation using Monolithic Quad-Parallel Mach-Zehnder Optical Modulator and Signal Transmission over 75-km Single-Mode Fiber, CLEO/IQEC 2010, CThC1, 2010
• 160 Gb/s full-ETDM NRZ-DQPSK modulation by a broadband optical IQ modulator, IEICE-OPE Workshop, 2010
• Electro-optic synthesis of high-speed optical multilevel signals, IEICE-OPE Workshop, 2010
• Monolithically integrated Quad Mach-Zehnder IQ Modulator for Optical 16-QAM Generation (Postdeadline Paper), CLEO/IQEC 2010, CPDA7, 2010
• 360-Gb/s NRZ-DP-DQPSK Modulation with Full-ETDM Technique, The 15th OptoElectronics and Communications Conference (OECC2010), 8B2-2, 2010
• 40Gb/s DP-NRZ-QPSK Signal Generation Using a Dual-Polarization Quad-Parallel Mach-Zehnder Modulator, The 15th OptoElectronics and Communications Conference (OECC2010), 8B2-3, 2010
• 16 Quadrature Amplitude Modulation Using Polarization-Multiplexing QPSK Modulator, The 15th OptoElectronics and Communications Conference (OECC2010), 8B1-3, 2010
• Monolithically Integrated Quad Mach-Zehnder IQ Modulator for Generation of Advanced Optical Modulation Formats (invited), 9th international conference on optical communications and networks, 2010
• High-speed DBPSK signal generation by low-V_pi modulator using thin LiNbO3 substrate, A. Kanno,T. Sakamoto,A. Chiba,T. Kawanishi,K. Higuma,M. Sudou,J. Ichikawa, European Conference on Optical Communication 2009, No. P2.09, Sep. 2009, Vienna, Austria
• Optical trellis-coded modulation with multi-parallel MZM, T. Sakamoto,A. Chiba,I.Morohashi,T. Kawanishi, European Conference on Optical Communication 2009, No. P3.17, Sep. 2009, Vienna, Austria
• Optical MSK Transmitter using a Monolithically Integrated Quad Mach-Zehnder IQ Modulator, G.-W. Lu,T. Sakamoto,A. Chiba,T. Kawanishi,T. Miyazaki,K. Higuma,J. Ichikawa, European Conference on Optical Communication 2009, No. 5.2.1, Sep. 2009, Vienna, Austria
• High-Speed and Precise Lightwave Modulation Technologies (invited), T. Kawanishi,T. Sakamoto,A. Chiba, The 14th Opto-Electronics and Communications Conference (OECC2009), No. ThQ1, Jul. 2009, Hong-Kong, China
• Precise and High-Speed Lightwave Control for Huge-Capacity Transmission and Advanced Optical Signal Processing (Invited), T. Kawanishi,T. Sakamoto,A. Chiba, 11th International Conference on Transparent Optical Networks (ICTON) 2009, No. We.A2.1, Jun. 2009, Island of Sao Miguel, Azores, Portugal
• High-speed and Precise Lightwave Modulation for Millimeter- or Micro-wave Generation (invited), T. Kawanishi,T. Sakamoto,A. Chiba,D. Nanbu,H. Toda,H. Murata,A. Enokihara, Progress In Electromagnetics Research Symposium (PIERS) 2009, 1P1-4, Mar. 2009, Central Garden Hotel, Beijing, China (2009).
• Analysis of crosstalk impact on optical packet signals in an optical cross-bar switch by intensity-trimming method, A. Chiba,T. Kawanishi,T. Sakamoto,K. Higuma,M. Izutsu, OFC/NFOEC 2009, JWA19, Mar. 2009, San Diego, U.S.A.
• Guard-time-free port selection by a LiNbO3 optical switch embedded intensity trimmers for optical packet switching, A. Chiba,T. Kawanishi,T. Sakamoto,K. Higuma,M. Izutsu, OFC/NFOEC 2009, JThA35, Mar. 2009, San Diego, U.S.A.
• High-bit-rate optical QAM (invited), T. Sakamoto,A. Chiba,T. Kawanishi, OFC/NFOEC 2009, OWG5, Mar. 2009, San Diego, U.S.A.
• Electro-optic synthesis of 8PSK by quad-parallel Mach-Zehnder modulator, T. Sakamoto,A. Chiba,T. Kawanishi, OFC/NFOEC 2009, OTuG4, Mar. 2009, San Diego, U.S.A.
• Advances and Challenges in vector modulation technologies (invited), T. Kawanishi,T. Sakamoto,A. Chiba, SPIE Photonics WEST2009, 7234-11, Jan. 2009, San Jose, CA, U.S.A.
• Optical signal wavelength swapping based on optical sideband generation in interferometric-type optical switch with intensity trimmers, IEICE-OPE Workshop, 2009
• Advances and Challenges in vector modulation technologies (invited), T. Kawanishi, T. Sakamoto, and A. Chiba, SPIE Photonics WEST2009, 7234-11, 2009, English
• High-bit-rate optical QAM (invited), T. Sakamoto, A. Chiba and T. Kawanishi, OFC/NFOEC 2009, 2009, English, International conference
• High-speed and Precise Lightwave Modulation for Millimeter- or Micro-wave Generation (invited), Progress In Electromagnetics Research Symposium (PIERS) 2009, 1P1-4, 2009
• Frequency Swapping Using an Optical Switch with Embedded Mach-Zehnder Structures for Wavelength-Converted Optical Signal Routing Without Lightsources, CLEO/IQEC 2009, CMJJ5, 2009
• Effect of histogram resolution on demodulation of optical quadrature amplitude modulation signal by adaptive threshold adjustment, CLEO/Europe-EQEC 2009, CI1.5, 2009
• Precise and High-Speed Lightwave Control for Huge-Capacity Transmission and Advanced Optical Signal Processing (Invited), 11th International Conference on Transparent Optical Networks (ICTON) 2009, No. We.A2.1, 2009
• Electro-Optic Synthesis of Multi-Level Coherent Signals (invited), The 14th Opto-Electronics and Communications (OECC2009), ThP5, 2009
• Generation of Optical MSK Using a Monolithically Integrated Quad Mach-Zehnder IQ Modulator, The 14th Opto-Electronics and Communications Conference (OECC2009), ThQ3, 2009
• High-Speed and Precise Lightwave Modulation Technologies (invited), The 14th Opto-Electronics and Communications Conference (OECC2009), No. ThQ1, 2009
• Pure Intensity Modulated Frequency Doubled Optical Clock Signal Generation by Using Ultra Low-Chirp and High Extinction-Ratio Optical Modulation, The 14th Opto-Electronics and Communications Conference (OECC2009), TuG4, 2009
• Optical signal wavelength swapping based on optical sideband generation in interferometric-type optical switch with intensity trimmers, IEICE-OPE Workshop, 2009
• Frequency Swapping Using an Optical Switch with Embedded Mach-Zehnder Structures for Wavelength-Converted Optical Signal Routing Without Lightsources, CLEO/IQEC 2009, CMJJ5, 2009
• Effect of histogram resolution on demodulation of optical quadrature amplitude modulation signal by adaptive threshold adjustment, CLEO/Europe-EQEC 2009, CI1.5, 2009
• Electro-Optic Synthesis of Multi-Level Coherent Signals (invited), The 14th Opto-Electronics and Communications (OECC2009), ThP5, 2009
• Generation of Optical MSK Using a Monolithically Integrated Quad Mach-Zehnder IQ Modulator, The 14th Opto-Electronics and Communications Conference (OECC2009), ThQ3, 2009
• Pure Intensity Modulated Frequency Doubled Optical Clock Signal Generation by Using Ultra Low-Chirp and High Extinction-Ratio Optical Modulation, The 14th Opto-Electronics and Communications Conference (OECC2009), TuG4, 2009
• 50-km SMF transmission of 50-Gb/s 16 QAM generated by quad-parallel MZM, T. Sakamoto,A. Chiba,T. Kawanishi, ECOC2008, paper Tu.1.E.3, Sep. 2008, Brussels, Belgium
• High-speed dual-parallel Mach-Zehnder modulator using thin lithium niobate substrate, T. Kawanishi,T. Sakamoto,A. Chiba,M. Izutsu,K. Higuma,J. Ichikawa,T. Lee,V. Filsinger, OFC/NFOEC 2008, JThA34, Feb. 2008, San Diego, U.S.A.
• Duobinary signal generation using high-extinction ratio modulation, T. Kawanishi,T. Sakamoto,A. Chiba,M. Izutsu,P.J. Winzer, OFC/NFOEC 2008, OWL2, Feb. 2008, San Diego, U.S.A.
• Adaptive symbol discrimination method for distorted multi-level optical signal and its application to decoding of high-speed optical quadrature amplitude modulation, A. Chiba,T. Sakamoto,T. Kawanishi, OFC/NFOEC 2008, JWA63, Feb. 2008, San Diego, U.S.A. (2008).
• Discrimination of Distorted Multilevel Optical Signal for Decoding of a High-Speed Optical QAM signal, IEICE-OPE Workshop, 2008
• Highly Pure 160-GHz Two-Tone Lightwave Generation using High Extinction-Ratio Optical Intensity Modulator and Delay Interferometer, IEICE-OPE Workshop, 2008
• Measurement of Mach-Zehnder interferometer based modulators by using optical spectrum analysis, IEICE-OPE Workshop, 2008
• Ultra high extinciton-ratio and ultra low chirp optical intensity modulation for pure two-tone lightwave signal generation, CLEO/IQEC 2008, CFA1, 2008
• Highly Pure 160-GHz Two-Tone Lightwave Generation using High Extinction-Ratio Optical Intensity Modulator and Delay Interferometer, IEEE-LEOS Annual Meeting, WB2, 2008
• 多値変調を実現する高速・高精度光変調技術(invited), 第55回応用物理学関係連合講演会, 28a-ZG-5（分科内招待講演）, 2008
• 4並列型マハツェンダ変調器による50Gb/s,16QAM信号の変復調及びSMF伝送実験(奨励講演), 電子情報通信学会2008年ソサイエティ大会、B-10-69, 2008
• LNデバイスによる超高速QPSK／QAM変調(invited), 電子情報通信学会2008年ソサイエティ大会、BCS-2-2（依頼講演）, 2008
• 超高速多値集積化光変調器の研究(invited), 東北大学電気通信研究所共同プロジェクト研究会、No.2（招待講演）, 2008
• Discrimination of Distorted Multilevel Optical Signal for Decoding of a High-Speed Optical QAM signal, IEICE-OPE Workshop, 2008
• Highly Pure 160-GHz Two-Tone Lightwave Generation using High Extinction-Ratio Optical Intensity Modulator and Delay Interferometer, IEICE-OPE Workshop, 2008
• Measurement of Mach-Zehnder interferometer based modulators by using optical spectrum analysis, IEICE-OPE Workshop, 2008
• Highly Pure 160-GHz Two-Tone Lightwave Generation using High Extinction-Ratio Optical Intensity Modulator and Delay Interferometer, IEEE-LEOS Annual Meeting, WB2, 2008
• Ultra high extinciton-ratio and ultra low chirp optical intensity modulation for pure two-tone lightwave signal generation, CLEO/IQEC 2008, CFA1, 2008
• Study of precise optical modulation using Mach-Zehnder interferometers for advanced modulation formats, T. Kawanishi,T. Sakamoto,A. Chiba,M. Izutsu, ECOC2007, paper 6.2.3, Sep. 2007, Berlin, Germany (2007).
• Reports on OFC/OFOEC 2007, T. Kawanishi,N. Yamamoto,A. Chiba,R. Katouf, Sep. 2007
• Advanced LiNbO3 modulation (Invited), T. Kawanishi,T. Sakamoto,A. Chiba,M. Izutsu, CLEO/IQEC 2007, CMH1, May 2007, Baltimore, U.S.A.
• CPFSK/MSK Modulation with a Monolithic Integrated LiNbO3 Modulator, T. Sakamoto,A. Chiba,T. Kawanishi,M. Izutsu, OFC/NFOEC 2007, OThD6, Mar. 2007, Anaheim Convention Center, Anaheim, California, U.S.A.
• Performance Improvement of High-Extinction-Ratio LiNbO3 Optical Intensity Modulator by Means of Polarization Crosstalk Reduction, IEICE-OPE Workshop, 2007
• Reports on OFC/OFOEC 2007, 2007
• High-speed optical QAM signal generation and quality estimation method, IEICE-OPE Workshop, 2007
• Complex digital-to-analog convertor for optical vector modulation, IEICE-OPE Workshop, 2007
• 50-Gb/s 16 QAM by a quad-parallel Mach-Zehnder modulator (Postdeadline Paper), 33th European Conference and Exhibition on Optical Communication (ECOC2007), PD2.6, 2007
• Ultra Wideband Light Source Using 136-Wavelengths SSB Frequency Sweep Technique for Optical Coherence Tomography, 2007 IEEE INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP2007), B4P-F, 2007
• Performance improvement of high-extinction-ratio LiNbO3 optical intensity modulator by means of polarization crosstalk reduction, 2007 IEEE INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS(MWP2007), B4P-E, 2007
• Ultra Wideband Light Source for optical Coherence Tomography Using Optical SSB Frequency Sweep Technique, International Symposium on Contemporary Photonics Technology 2007 (CPT2007), G-25, 2007
• Advanced LiNbO3 modulation (Invited), CLEO/IQEC 2007, CMH1, 2007
• Ultra fast optical frequency sweep with an integrated lithium niobate modulator, OECC/IOOC 2007, 13D3-6, 2007
• Demonstration of optical quadrature amplitude modulation by using a high-speed optical DQPSK modulator and precise voltage-control technique, 12th Optoelectronics and Communications Conference / 16th International Conference on Integrated Optics and Optical Fiber Communication (OECC/IOOC2007), 12B3-4, 2007
• Agile Wideband Light Source for Optical Coherence Tomography Using Optical SSB Frequency Sweep Technique, IEEE-LEOS Summer Topicals 2007, WB2.4, 2007
• High-extinction-ratio (>55dB) port selection by using a high-speed LiNbO3 optical switch with intensity trimmers, IEEE-LEOS Photonics in Switching 2007, TuB1.4, 2007
• High-speed optical QAM signal generation and quality estimation method, IEICE-OPE Workshop, 2007
• Complex digital-to-analog convertor for optical vector modulation, IEICE-OPE Workshop, 2007
• Performance Improvement of High-Extinction-Ratio LiNbO3 Optical Intensity Modulator by Means of Polarization Crosstalk Reduction, IEICE-OPE Workshop, 2007
• Ultra Wideband Light Source for optical Coherence Tomography Using Optical SSB Frequency Sweep Technique, International Symposium on Contemporary Photonics Technology 2007 (CPT2007), G-25, 2007
• Ultra fast optical frequency sweep with an integrated lithium niobate modulator, OECC/IOOC 2007, 13D3-6, 2007
• Demonstration of optical quadrature amplitude modulation by using a high-speed optical DQPSK modulator and precise voltage-control technique, 12th Optoelectronics and Communications Conference / 16th International Conference on Integrated Optics and Optical Fiber Communication (OECC/IOOC2007), 12B3-4, 2007
• Agile Wideband Light Source for Optical Coherence Tomography Using Optical SSB Frequency Sweep Technique, IEEE-LEOS Summer Topicals 2007, WB2.4, 2007
• High-extinction-ratio (>55dB) port selection by using a high-speed LiNbO3 optical switch with intensity trimmers, IEEE-LEOS Photonics in Switching 2007, TuB1.4, 2007
• 50-Gb/s 16 QAM by a quad-parallel Mach-Zehnder modulator (Postdeadline Paper), 33th European Conference and Exhibition on Optical Communication (ECOC2007), PD2.6, 2007
• Performance improvement of high-extinction-ratio LiNbO3 optical intensity modulator by means of polarization crosstalk reduction, 2007 IEEE INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS(MWP2007), B4P-E, 2007
• Ultra Wideband Light Source Using 136-Wavelengths SSB Frequency Sweep Technique for Optical Coherence Tomography, Yamamoto Takehiro,Kohno Ryuji,Chiba Akito,Sakamoto Takahide,Kawanishi Tetsuya, 2007 IEEE INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP2007), B4P-F, 2007, English
• Fano resonance in transmission spectra of a tapered optical fiber coupled with a microsphere, SPIE Photonics West, LASE 2006 (lasers and applications in science and engineering), 6101A-73, 2006
• Low-Crosstalk LiNbO3 Optical Switch with Embedded Sub Mach-Zehnder Structures, IEEE-LEOS 2006 Annual Meeting, ThF4, 2006
• Low-Crosstalk LiNbO3 Optical Switch with Embedded Sub Mach-Zehnder Structures, IEEE-LEOS 2006 Annual Meeting, ThF4, 2006
• Fano resonance in transmission spectra of a tapered optical fiber coupled with a microsphere, SPIE Photonics West, LASE 2006 (lasers and applications in science and engineering), 6101A-73, 2006
• Quantum phase gate using single atom nonlinearity, 17th International Conference on Laser Spectroscopy, No.M90, 2005
• Change of asymmetric lineshape in transmission spectra of a tapered fiber coupled with a microspherical cavity, International Conference on Quantum Electronics 2005 / the Pacific Rim Conference on Lasers and Electro-Optics 2005 (IQEC/CLEO-PR 2005), CWAB3-P68, 2005
• Quantum phase gate using single atom nonlinearity, 17th International Conference on Laser Spectroscopy, No.M90, 2005
• Change of asymmetric lineshape in transmission spectra of a tapered fiber coupled with a microspherical cavity, International Conference on Quantum Electronics 2005 / the Pacific Rim Conference on Lasers and Electro-Optics 2005 (IQEC/CLEO-PR 2005), CWAB3-P68, 2005
• A microspherical cavity coupled with a tapered fiber - Nano optical device for quantum phase gate -, The International Symposium on Quantum Info-Communications and Related Quantum Nanodevices, No. P-18, 2004
• Characterization of a microspherical cavity with a stem by observing resonantly scattered far-field incident light, Nonlinear Optics: Materials, Fundamentals, and Applications, WD19, 2004
• Manipulation of optical coupling to whispering-gallery mode of microspherical cavity, 8th International Conference on Optics Within Life Science (OWLS 8), pp.70-71, 2004
• A microspherical cavity coupled with a tapered fiber - Nano optical device for quantum phase gate -, The International Symposium on Quantum Info-Communications and Related Quantum Nanodevices, No. P-18, 2004
• Characterization of a microspherical cavity with a stem by observing resonantly scattered far-field incident light, Nonlinear Optics: Materials, Fundamentals, and Applications, WD19, 2004
• Manipulation of optical coupling to whispering-gallery mode of microspherical cavity, 8th International Conference on Optics Within Life Science (OWLS 8), pp.70-71, 2004
• Fine frequency tuning of a microspherical cavity by temperature control, Conference on Lasers and Electro-Optics /Europe (CLEO/Europe 2003), CM3M, 2003
• Scattering analysis of a microsphere at the tip of an optical fiber, The XXIst International Conference on Photochemistry (ICP21), pp.226-227, 2003
• Fine frequency tuning of a microspherical cavity by temperature control, Conference on Lasers and Electro-Optics /Europe (CLEO/Europe 2003), CM3M, 2003
• Scattering analysis of a microsphere at the tip of an optical fiber, The XXIst International Conference on Photochemistry (ICP21), pp.226-227, 2003

Industrial Property Rights

• Patent right, Method for evaluating characteristic of optical modulator having Mach-Zehnder interferometer, T. Kawanishi, A. Chiba, J. Ichikawa and M. Sudou, WO2011/027409A1, US 13/394,382, US 8867042 B2, ZL200980161303.9,, Yes, Yes, Yes, Yes, Yes
• Patent right, Quadrature amplitude modulation signal generating device, T. Kawanishi, T. Sakamoto, A. Chiba and M. Tsuchiya, WO2009/037794A1, US 12/678,491, US 8676060 B2, Yes, Yes, Yes, Yes, Yes
• Patent right, 特願2011-529707, WO2011/027409, 特許第5622154号, Yes, Yes
• Patent right, 特願2008-035468, 特開2009-194784, 特許第5099506号, Yes, Yes
• Patent right, 特願2007-285782, 特開2009-094988, 特許第5168685号, Yes, Yes
• Patent right, 特願2007-189902, 特開2009-025202, 特許第5181384号, Yes, Yes
• Patent right, 特願2010-245735, 特開2011-197638, 特許第5757557号
• Patent right, 特願2009-43106, 特開2010-197751, 特許第5354528号, Yes, Yes
• Patent right, 特願2009-43146, 特開2010-197753, 特許第5354529号, Yes, Yes

Awards

• 16 Oct. 2020, International academic award, Japan
• Prof. Yoshimachi Memorial award, Faculty of Engineering, Hokkaido University, Mar. 2000

Research Projects

• Competitive research funding

  対象リソースIRI

Academic Contribution

• Academic society etc, The Optical Society, Jun. 2016, Jun. 2016, San Jose, CA, US, International academic contribution