Kyushu University Academic Staff Educational and Research Activities Database
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Kazutoshi Kato Last modified date:2016.09.30



Graduate School


Academic Degree
Dr. Engineering
Field of Specialization
Integrated optoelectronics system
Outline Activities
Research: coraborative research on "Tunable laser system for ultra-wide band optical communications" with a Japanese company, "High speed optical wavelength converter for ultra-wide band optical communications" supported by Grants-in-Aid for Scientific Research, "Teraherz 100Gbit/s real-tme wireless transmission" supported by the Strategic Information and Communications R&D Promotion Programme (SCOPE) 2014, from the Ministry of Internal Affairs and Communications, Japan.
Education: Lecture of "Material science I" for 2nd-degree of undergraduate students "Electromagnetic wave enginering I" for 3rd-degree of undergraduate students and "High-frequency devices" for 1st-degree master course students, Superviser of three 4th-degree of undergraduate students' graduation theses, and three 2nd-degree and two 1st-degree master course students' theses.
Social activities: Member of Microwave photonice committee, Member of Microoptics research group and Editing chairperson of IEICE ES journal (Japanese edition).
Research
Research Interests
  • Teraherz-wave large capacity wireless transmission
    keyword : Teraherz-wave, wireless transmission
    2013.10~2016.03.
  • controll of semiconductor laser diode for ultrawide-band optical communication
    high-speed wavelength converter for ultrawide-band optical communication
    keyword : optoelectronics, semiconductor laser, optical communication
    2012.04~2015.03.
Academic Activities
Papers
1. Hirokazu Onji, Shota Takeuchi, Yudai Tatsumoto, Nobuhiro Nunoya, Makoto Shimokozono, Hiroyuki Ishii, Kazutoshi Kato, Fast wavelength switching with tunable distributed amplification distributed feedback laser by feedforward control technique, Jpn. J. Appl. Phys., Vol. 53, 2014.07.
Presentations
1. Kazuki Sakuma, Yuki Fjimura, Shota Takeuchi, Kazutoshi Kato, Shintaro Hisatake, Tadao Nagatsuma, Coherent THz Power Combiner Consisting of Arrayed Uni-Traveling Carrier Photodiodes  and Planar Lightwave Circuit, SPIE Photonics West 2016, 2016.02.18.
2. Jun Tsuboi, Takeshi Kuboki, Kazutoshi Kato, WAVELENGTH STABILIZATION WITHIN 0.05 GHz WITH PHOTOMIXING TECHNIQUE AND LASER CURRENT CONTROLLING, 20th Microoptics Conference (MOC’15), 2015.10.27.
3. Jun Haruki, Kazuki Sakuma, Kazutoshi Kato, SYNCHRONOUS THZ WAVE COMBINER CONSISTING OF ARRAYED PHOTOMIXERS, 20th Microoptics Conference (MOC’15), 2015.10.27, [URL].
4. Ryoga Kimura, Yudai Tatsumoto, Kazuki Sakuma, Hitrokazu Onji, Makoto Shimokozono, Hiroyuki Ishii, Fast Wavelength Stabilization of Tunable Lasers with the Internal Wavelength Locker, 20th Microoptics Conference (MOC’15), 2015.10.27, [URL].
5. Yudai Tatsumoto, Ryoga Kimura, Hirokazu Onji, Kazutoshi Kato, Hiroyuki Ishii, Makoto Shimokozono, High-speed, High-Accuracy 400-GHz Wavelength Switching at Tunable Distributed Amplification (TDA-) DFB Laser using Feedforward Control, 20th Optoelectronics and Communications Conference, 2015.07.02, [URL].
6. Kazuki Sakuma, Shota Takeuchi, Yuki Fujimura, Jun Haruki, Kazutoshi Kato, Shintaro Hisatake, Tadao Nagatsuma, First Demonstraion of Mach-Zehnder-Interferometric Phase-Stabilizaion at Optoelectronic Carrier Generation for Phase-Shift Keying Signal, 20th Optoelectronics and Communications Conference, 2015.06.29, [URL].
7. Kazuki Sakuma, Shota Takeuchi, Yuki Fujimura, Jun Haruki, Kazutoshi Kato, Shintaro Hisatake, Tadao Nagatsuma, Mach-Zehnder Interferometric Phase Stabilization for Optoelectronic Carrier Generation, The Third International Japan-Egypt Conference on Electronics, Communications and Computers, March 17, 2015, 2015.03.17.
8. Atsushi Saeki, Kazutoshi Kato, Fine wavelength stabilization of the DFB laser by photo-mixing with reference wavelengths, The Third International Japan-Egypt Conference on Electronics, Communications and Computers, March 17, 2015, 2015.03.17.
9. Atsushi Saeki, Kazutoshi Kato, Fine wavelength stabilization of the DFB laser at the flexible grid by photo-mixing with reference wavelengths, 2014 Asia-Pacific Microwave Conference (APMC) 2014, FG1G-43, Sendai, 2014, 2014.11.07.
10. Shota Takeuchi, Kazutoshi Kato, Y.Yoshimizu, Y. Yasuda, Shintaro Hisatake, Tadao Nagatsuma, Coherent Sub-THz Carrier Frequency Transmission with Novel Pseudo-Mach-Zehnder Interferometric Phase Stabilization, 2014 International Topical Meeting on Microwave Photonics (MWP) 2014, TuEF-1, Sapporo, 2014, 2014.10.21.
11. Hirokazu Onji, Yudai Tatsumoto, Kazutoshi Kato, Nobuhiro Nunoya, Makoto Shimokozono, Hiroyuki Ishii, Stable Wavelength Switching within 50 ns using Tunable Distributed Amplification (TDA-) DFB Lasers
, 2014.08.28.
12. Hirolazu Onji, Shota Takeuchi, Yudai Tatsumoto, Nobuhiro Nunoya, Makoto Shimokozono, Hiroyuki Ishii, Kazutoshi Kato, 35 ns Wavelength Switching with +/- 1 GHz Wavelength Accuracy using Tunable Distributed Amplification(TDA-) DFB Lasers, Photonics in Switching, Advanced Photonics for Communications, WPW4B.3, San Diego, USA, 2014 , 2014.07.
13. Shota Takeuchi, Kazutoshi Kato, Shintaro Hisatake, Tadao Nagatsuma, Sub-THz Carrier Frequency Generation Stabilized by Mach-Zehnder Interferometric Phase Detection Scheme, 19th Microoptics Conference, 2014.06.26.
14. Optimization of Feedback Control Parameters for Tunable Lasers.
15. Hirokazu Onji, Shota Takeuchi, Nobuhiro Nunoya, Makoto Shimokozono, Hiroyuki Ishii, Kazutoshi Kato, ACCELERATION OF WAVELENGTH SWITCHING FOR TUNABLE DISTRIBUTED AMPLIFICATION (TDA-) DFB LASERS
, 18th Microoptics Conference (MOC'13), 2013.10.29.
16. Shota Takeuchi, Hirokazu Onji, Nobuhiro Nunoya, Makoto Shimokozono, Hiroyuki Ishii, Kazutoshi Kato, WAVELENGTH STABILIZATION OF TUNABLE LASERS BASED ON THERMAL-DRIFT CANCELER, 18th Microoptics Conference (MOC'13), 2013.10.29.
Membership in Academic Society
  • The Laser Society of Japan
  • The Institute of Electrical and Electronics Engineers
  • The Japan Society of Applied Physics
  • The Institute of Electronics, Information and Communication Engineers
Educational