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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
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Committee Date Time Place Paper Title / Authors Abstract Paper #
HIP 2021-10-22
Online Online Dependence of Locus of Attention on Depth of Field under Retinal Illuminance Constancy Condition -- Investigation Using Extended Depth of Field (EDoF) Lenses --
Genta Higashi, Yuichiro Orita, Shoko Hira, Masayuki Kashima (Kagoshima Univ.), Yasushi Miyajima, Kazutoshi Kato (ITOH Opt), Sakuichi Ohtsuka (ICT) HIP2021-45
By using extended depth-of-field (EDoF) lenses (eyeglasses), we became able to measure the relationship between depth-of... [more] HIP2021-45
Online Online [Invited Talk] Terahertz wave generation by photomixers and its application to communication technology
Kazutoshi Kato (Kyushu Univ.) CQ2021-44
 [more] CQ2021-44
OPE, LQE 2020-11-20
Online Online Feasibility confirmation of high-security wireless communication using high-directivity THz Waves -- Realization of AND operation by homodyne detection and heterodyne detection --
Yusuke Kawai, Kenta Yamauchi, Kazutoshi Kato (Kyushu Univ.) OPE2020-55 LQE2020-35
We have been inventing a new encrypted methods to improve physical-layer security of wireless communication. As one of c... [more] OPE2020-55 LQE2020-35
OPE, LQE 2020-11-20
Online Online Sub-THz-Repetition Optical Waveform Measurement by Novel THz-wave Autocorrelator
Ruo Yamamoto, Kazutoshi Kato (Kyushu Univ.) OPE2020-56 LQE2020-36
For observation of a high-repetition optical waveform, we had proposed a THz wave autocorrelator consisting of an optica... [more] OPE2020-56 LQE2020-36
OPE, LQE 2020-11-20
Online Online THz-Wave Power Multiplication by Parallel-Connection UTC-PDs
Yuki Matsuo, Ming Che, Haruichi Kanaya, Kazutoshi Kato (Kyushu Univ.) OPE2020-57 LQE2020-37
 [more] OPE2020-57 LQE2020-37
OPE, LQE 2020-11-20
Online Online Novel Terahertz-Wave Beam Steering Method by Photomixing with Chromatic Dispersion of Optical Fibers
Takumi Saito, Kazutoshi Kato (Kyushu Univ.) OPE2020-59 LQE2020-39
We proposed a new beam steering method of terahertz wave generated by the photomixing using the chromatic dispersion of ... [more] OPE2020-59 LQE2020-39
MWP 2020-05-28
Online Online Fermi-level-managed Barrier Diode Receiver and its Application in 300-GHz-band
Fumiya Ayano, Keita Toichi, Li Yi (Osaka Univ.), Hiroshi Ito (Kitasato Univ.), Kazutoshi Kato (Kyushu Univ.), Tadao Nagatsuma (Osaka Univ.) MWP2020-4
 [more] MWP2020-4
LQE, OPE, SIPH 2018-12-06
Tokyo Keio University Terahertz Pulse Wave Generation with Photoelectric Conversion
Ken Mitsueda, Kohei Ichiyama, Kazutoshi Kato (Kyushu Univ.) OPE2018-119 LQE2018-129 SIPH2018-35
We have studied the use of pulse waves with a high-repetition frequency in the terahertz region that can achieve the sam... [more] OPE2018-119 LQE2018-129 SIPH2018-35
LQE, OPE, SIPH 2018-12-06
Tokyo Keio University Nonlinear Model for High-speed Wavelength Switching of Tunable Distributed Amplification (TDA-) DFB Laser
Hiroki Fukuda, Shunta Kono, Takeshi Kuboki, Kazutoshi Kato (Kyushu Univ.) OPE2018-120 LQE2018-130 SIPH2018-36
Optical burst systems and optical packet systems require optical sources capable of high-speed wavelength switching. Tun... [more] OPE2018-120 LQE2018-130 SIPH2018-36
LQE, OPE, SIPH 2018-12-06
Tokyo Keio University Wavelength Switching Method of DFB Laser for High-speed and Reliable Optical Switch
Shunta Kono, Hiroki Fukuda, Takeshi Kuboki, Kazutoshi Kato (Kyushu Univ.) OPE2018-121 LQE2018-131 SIPH2018-37
 [more] OPE2018-121 LQE2018-131 SIPH2018-37
ED, THz 2017-12-18
Miyagi RIEC, Tohoku Univ [Invited Talk] Semiconductor Photonics Device Technology for Coherent Terahertz-wave Generation
Kazutoshi Kato (Kyushu Univ.) ED2017-72
The terahertz wave is expected to be a promising media for a large capacity wireless transmission system and a high-reso... [more] ED2017-72
OPE 2017-12-07
Okinawa   [Poster Presentation] Etalon-filter-based mode hop detection for wavelength tunable lasers
Masataka Gohara, Takeshi Kuboki, Kazutoshi Kato (Kyushu Univ.) OPE2017-103
At the multi-electrode tunable laser diodes, mode hops appear when we sweep the wavelength with tuning currents. Therefo... [more] OPE2017-103
OPE 2017-12-07
Okinawa   [Poster Presentation] Prompt Stabilization of Optical Wavelength at Tunable Laser after Starting Oscillation
Hiroki Fukuda, Kenta Yamaguchi, Takeshi Kuboki, Kazutoshi Kato (Kyushu Univ.) OPE2017-105
In the future, high-speed optical switch will be the key to the optical network. We study high-speed wavelength switchin... [more] OPE2017-105
OPE 2017-12-07
Okinawa   [Poster Presentation] High-Repetition-Frequency Terahertz-Wave-Pulse Generation Based on Photonic Technique
Ken Mitsueda, Yusuke Yamanaka, Kazutoshi Kato (Kyushu Univ.) OPE2017-107
We have studied the use of pulse waves with a high-repetition frequency in the terahertz region that can achieve the sam... [more] OPE2017-107
OPE 2017-12-08
Okinawa   600-GHz Coherent Terahertz Wave Combiner
Yang Zhou, Goki Sakano, Yusuke Yamanaka (Kyushu Univ.), Hiroshi Ito (Kitasato Univ.), Tadao Ishibashi (NEL Techno), Kazutoshi Kato (Kyushu Univ.) OPE2017-115
For future high-speed wireless communication, the terahertz-wave transmission is attracting an attention. However, compa... [more] OPE2017-115
OCS, OPE, LQE 2017-10-26
Kumamoto Josaien, Sakuranobaba Demonstration of Optical-to-Wireless Media Conversion by Using Photomixing and Cross Gain Modulation
Yusuke Yamanaka, Takeshi Kuboki, Kazutoshi Kato (Kyushu Univ.) OCS2017-46 OPE2017-78 LQE2017-51
We devised the seamless media conversion system from an optical network to a THz-wave network utilizing the photomixing ... [more] OCS2017-46 OPE2017-78 LQE2017-51
MWP 2016-11-14
Tokyo Kikai-Shinko-Kaikan Bldg. Proposal and demonstration of chromatic dispersion measurement at optical waveguide devices and application for controlling phase of THz wave
Yusuke Yamanaka, Goki Sakano, Jun Haruki, Takeshi Kuboki, Kazutoshi Kato (Kyushu Univ.) MWP2016-52
Terahertz (THz) wave, whose frequency is raging from 100GHz to 10THz, is one of the candidates of the media for short-di... [more] MWP2016-52
OPE 2015-12-11
Ishikawa Shiinoki Cultural Complex High-speed, High-Accuracy Wavelength Switching at Wavelength Tunable Laser using Feedforward Control
Yudai Tatsumoto, Ryoga Kimura (Kyushu Univ.), Makoto Shimokozono, Hiroyuki Ishii (NTT), Kazutoshi Kato (Kyushu Univ.) OPE2015-143
We present the method of the high-speed wavelength switching of the tunable distributed amplification (TDA-) DFB laser b... [more] OPE2015-143
MWP 2015-05-25
Tokyo Kikai-Shinko-Kaikan Bldg. Reduction of phase fluctuation at the beat signal by the lightwave interferometric method -- Novel technique for low phase noise coherent THz-wave generation --
Kazuki Sakuma, Shota Takeuchi, Yuki Fujimura, Jun Haruki, Kazutoshi Kato (Kyushu Univ.), Shintaro Hisatake, Tadao Nagatsuma (Osaka Univ.) MWP2015-5
 [more] MWP2015-5
OPE, LQE 2014-12-19
Tokyo Kikai-Shinko-Kaikan, NTT Atsugi R&D center Bandwidth Enhancement by Coupling to Higher Order Resonances in Active Multimode Interferometer Laser Diode
Mohammad Nasir Uddin, Hong Bingzhou, Takuya Kitano (Kyushu Univ.), Akio Tajima (NEC), Kazutoshi Kato, Kiichi Hamamoto (Kyushu Univ.) OPE2014-149 LQE2014-136
Active multimode interferometer laser diode (MMI-LD) with split pump section has been designed and evaluated to achieve ... [more] OPE2014-149 LQE2014-136
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