T
Tetsuya Kawanishi
Researcher at National Institute of Information and Communications Technology
Publications - 781
Citations - 8852
Tetsuya Kawanishi is an academic researcher from National Institute of Information and Communications Technology. The author has contributed to research in topics: Electro-optic modulator & Optical modulator. The author has an hindex of 42, co-authored 760 publications receiving 8271 citations. Previous affiliations of Tetsuya Kawanishi include ASTRON & Kyoto University.
Papers
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Journal ArticleDOI
Asymptotic formalism for ultraflat optical frequency comb generation using a Mach-Zehnder modulator.
TL;DR: It is theoretically prove that a conventional Mach-Zehnder modulator can generate an optical frequency comb with excellent spectral flatness and predicts the conversion efficiency and bandwidth of the generated frequency comb.
Journal ArticleDOI
Single side-band modulation performance of a LiNbO 3 integrated modulator consisting of four-phase modulator waveguides
S. Shimotsu,Satoshi Oikawa,T. Saitou,N. Mitsugi,K. Kubodera,Tetsuya Kawanishi,Masayuki Izutsu +6 more
TL;DR: In this paper, the performance of a LiNbO/sub 3/ integrated modulator consisting of four phase modulator waveguides was analyzed for a 10 GHz single-tone signal with a driving voltage of 6.3 V/sub p-p/p/
Proceedings ArticleDOI
19-core fiber transmission of 19×100×172-Gb/s SDM-WDM-PDM-QPSK signals at 305Tb/s
Jun Sakaguchi,Benjamin J. Puttnam,Werner Klaus,Yoshinari Awaji,Naoya Wada,Atsushi Kanno,Tetsuya Kawanishi,Katsunori Imamura,Harumi Inaba,Kazunori Mukasa,Ryuichi Sugizaki,Tetsuya Kobayashi,Masayuki Watanabe +12 more
TL;DR: A novel free-space coupling system combined with a multi-core fiber enables up-scaling to a record space-division-multiplexed (SDM) channel number of 19 and achieves 305-Tb/s transmission over 10.1 km using 19-SDM, 100-WDM PDM-QPSK signals.
Journal ArticleDOI
High-Speed Control of Lightwave Amplitude, Phase, and Frequency by Use of Electrooptic Effect
TL;DR: In this paper, high-speed control of lightwave using electrooptic effect is investigated, where optical single-sideband (SSB) and frequency-shift-keying (FSK) modulators are used.
Journal ArticleDOI
40 Gb/s W-band (75–110 GHz) 16-QAM radio-over-fiber signal generation and its wireless transmission
Atsushi Kanno,Keizo Inagaki,Isao Morohashi,Takahide Sakamoto,Toshiaki Kuri,Iwao Hosako,Tetsuya Kawanishi,Yuki Yoshida,Ken-ichi Kitayama +8 more
TL;DR: 40-Gb/s W-band 16-QAM radio-over-fiber signal is optically synthesized using dual-polarization QPSK modulator and its wireless transmission within FEC limit is demonstrated with optical self-heterodyne detection and digital signal processing.