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Keisuke Kasai
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2020 – today
- 2024
- [c40]Masato Yoshida, Takaaki Hirai, Shohei Beppu, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa, Yuta Wakayama, Noboru Yoshikane:
New GAWBS Noise Interacting with Longitudinally Propagating Acoustic Waves in Few-mode Fibers. OFC 2024: 1-3 - 2023
- [j12]Masato Yoshida, Kosuke Kimura, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa:
Demodulation Performance Comparison of High-Speed Coherent Nyquist Pulse Signal with Analog and Digital Demultiplexing Schemes. IEICE Trans. Commun. 106(11): 1059-1064 (2023) - [c39]Dai Nakajima, Kazuki Nishimura, Mitsuki Watanabe, Tsung-Tse Lin, Keisuke Kasai, Masato Yoshida, Tetsuya Suemitsu, Taiichi Otsuji, Akira Satou:
Conversion Gain Enhancement of a UTC-PD-Integrated HEMT Photonic Double-Mixer by High-Intensity Optical Subcarrier Signal. OFC 2023: 1-3 - 2022
- [j11]Masato Yoshida, Kozo Sato, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa:
Precise Measurements and their Analysis of GAWBS-Induced Depolarization Noise in Multi-Core Fiber for Digital Coherent Transmission. IEICE Trans. Commun. 105-B(2): 151-158 (2022) - [j10]Kosuke Kimura, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
Experimental and Numerical Analysis of Ultrahigh-Speed Coherent Nyquist Pulse Transmission with Low-Nonlinearity Dispersion Compensator. IEICE Trans. Commun. 105-B(9): 1014-1022 (2022) - [c38]Masato Yoshida, Kosuke Kimura, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
Demodulation Performance Comparison of 160 Gbaud Coherent Nyquist Pulse Signal with Analog and Digital DEMUX Schemes. OECC/PSC 2022: 1-3 - 2021
- [c37]Takashi Kan, Keisuke Kasai, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa:
Broadband Dynamic Injection-Locking Performance of Fabry-Perot LD and Its Application to Coherent Homodyne Receiver. OFC 2021: 1-3 - [c36]Keisuke Kasai, Taisei Sato, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa:
64 Gbit/s, 256 QAM Transmission Through Coherent Optical-Wireless Link at 61 GHz Using Simple and High OSNR Carrier Frequency Converter. OFC 2021: 1-3 - [c35]Kozo Sato, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
GAWBS Noise Correlation Between Cores in Four-Core Fiber. OFC 2021: 1-3 - 2020
- [c34]Keisuke Kasai, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa:
64 Gbit/s, 256 QAM Coherently-Linked Optical and Wireless Transmission in 61 GHz Band Using Novel Injection-Locked Carrier Frequency Converter. ECOC 2020: 1-3 - [c33]Keisuke Kasai, Masataka Nakazawa:
10 GHz, 6.2 ps Transform-Limited Coherent Optical Pulse Generation from a 1.55 μm, Self-Injection Gain-Switched DFB-LD. OFC 2020: 1-3 - [c32]Naoya Takefushi, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
Experimental and Theoretical Analyses of GAWBS Phase Noise in Multi-Core Fiber for Digital Coherent Transmission. OFC 2020: 1-3 - [c31]Masato Yoshida, Takashi Kan, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
10 Tbit/s QAM Quantum Noise Stream Cipher Coherent Transmission over 160 km. OFC 2020: 1-3 - [c30]Takahide Murakami, Yoji Kishi, Koji Ishibashi, Keisuke Kasai, Hiroyuki Shinbo, Morihiko Tamai, Kensuke Tsuda, Masataka Nakazawa, Yu Tsukamoto, Hiroyuki Yokoyama, Yoshimi Fujii, Yuta Seki, Shinobu Nanba, Takanori Hara, Fumiyuki Adachi, Takayuki Sotoyama:
Research Project to Realize Various High-reliability Communications in Advanced 5G Network. WCNC 2020: 1-8
2010 – 2019
- 2019
- [c29]Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
Dual-Polarization On-Line 256 and 512 QAM Digital Coherent Transmission. OFC 2019: 1-3 - [c28]Naoya Takefushi, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
GAWBS Noise Characteristics in Digital Coherent Transmission in Various Optical Fibers. OECC/PSC 2019: 1-3 - [c27]Masato Yoshida, Takashi Kan, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
Real-Time 256 QAM Bi-directional Coherent Transmission in Next Generation Mobile Fronthaul. OECC/PSC 2019: 1-3 - 2018
- [c26]Keisuke Kasai, Masato Yoshida, Toshihiko Hirooka, Katsumi Iwatsuki, Masataka Nakazawa:
Backward-Rayleigh-Scattering Suppressed 160 Gbit/s 256 QAM Injection-Locked Bidirectional Coherent Transmission for Next Generation Mobile Fronthaul. ECOC 2018: 1-3 - [c25]Keisuke Kasai, Yixin Wang, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa:
Injection-locked Homodyne Detection for Higher-order QAM Transmission. OFC 2018: 1-3 - [c24]Masataka Nakazawa, Masaki Terayama, Seiji Okamoto, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka:
Observation of Guided Acoustic-Wave Brillouin Scattering and its Digital Compensation in Coherent QAM Transmission. OFC 2018: 1-3 - [c23]Seiji Okamoto, Masaki Terayama, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
Experimental and Numerical Comparison of Probabilistically-Shaped 4096 QAM and Uniformly-Shaped 1024 QAM in All-Raman Amplified 160 km Transmission. OFC 2018: 1-3 - [c22]Masaki Terayama, Seiji Okamoto, Keisuke Kasai, Masato Yoshida, Masataka Nakazawa:
4096 QAM (72 Gbit/s) Single-Carrier Coherent Optical Transmission with a Potential SE of 15.8 bit/s/Hz in All-Raman Amplified 160 km Fiber Link. OFC 2018: 1-3 - 2017
- [c21]Keisuke Kasai, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa, Masaki Shiraiwa, Yoshinari Awaji, Naoya Wada:
Single-carrier 552 Gbit/s, 46 Gbaud 64 QAM Coherent Transmission over 100 km with Co-propagating 10 Gbit/s-OOK Signals Through a Deployed ROADM Network. ECOC 2017: 1-3 - [c20]Keisuke Kasai, Yixin Wang, Masato Yoshida, Toshihiko Hirooka, Katsumi Iwatsuki, Masataka Nakazawa:
80 Gbit/s/ch, 256 QAM Digital Coherent Optical Transmission System with Injection-Locking for Next Generation Mobile Fronthaul Network. ECOC 2017: 1-3 - [c19]Kosuke Kimura, Junpei Nitta, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
A New Optical Phase-Locked System Between Ultrashort Pulses for 640 Gbaud Nyquist OTDM Coherent QAM Transmission. ECOC 2017: 1-3 - [c18]Takashi Kan, Keisuke Kasai, Masato Yoshida, Masataka Nakazawa:
42.3-Tbit/s, 18-Gbaud 64QAM WDM coherent transmission of 160 km over full C-band using an injection locking technique with a spectral efficiency of 9 bit/s/Hz. OFC 2017: 1-3 - [c17]Keisuke Kasai, Masataka Nakazawa, Yasunori Tomomatsu, Takashi Endo:
Full C-band, mode-hop-free wavelength-tunable laser diode with a linewidth of 8 kHz and a RIN of -130 dB/Hz. OFC 2017: 1-3 - [c16]Yixin Wang, Keisuke Kasai, Masato Yoshida, Masataka Nakazawa:
Single-carrier 216 Gbit/s, 12 Gsymbol/s 512 QAM coherent transmission over 160 km with injection-locked homodyne detection. OFC 2017: 1-3 - [c15]Masato Yoshida, Junpei Nitta, Kosuke Kimura, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
Single-channel 3.84 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with frequency-stabilized and mode-locked laser. OFC 2017: 1-3 - 2016
- [c14]Keisuke Kasai, Masato Yoshida, Masataka Nakazawa:
A 295 mW output, HCN frequency-stabilized CW erbium silica fiber laser with a linewidth of 5 kHz and a RIN of -120 dB/Hz. OFC 2016: 1-3 - 2015
- [j9]Toshihiko Hirooka, Keisuke Kasai, Yixin Wang, Masataka Nakazawa, Masaki Shiraiwa, Yoshinari Awaji, Naoya Wada:
First demonstration of digital coherent transmission in a deployed ROADM network with a 120 Gbit/s polarization-multiplexed 64 QAM signal. IEICE Electron. Express 12(23): 20150884 (2015) - [c13]Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa:
QAM quantum noise stream cipher using digital coherent optical transmission. ACSSC 2015: 1007-1011 - [c12]Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa:
Real-time adaptive 4-64 QAM, 20-60 Gbit/s quantum noise stream cipher transmission over 320 km with FPGA-based transmitter and receiver. ECOC 2015: 1-3 - [c11]Keisuke Kasai, Shohei Beppu, Yixin Wang, Masataka Nakazawa:
256 QAM (polarization-multiplexed, 5 Gsymbol/s) coherent transmission with an injection-locked homodyne detection technique. OFC 2015: 1-3 - [c10]David Odeke Otuya, Koudai Harako, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
Single-channel 1.92 Tbit/s, 64 QAM coherent orthogonal TDM transmission of 160 Gbaud optical Nyquist pulses with 10.6 bit/s/Hz spectral efficiency. OFC 2015: 1-3 - [c9]Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa:
Real-time 10 Gbit/s-16 QAM quantum stream cipher transmission over 320 km with FPGA-based transmitter and receiver. OFC 2015: 1-3 - 2014
- [j8]Yixin Wang, Keisuke Kasai, Masato Yoshida, Masataka Nakazawa:
60 Gbit/s, 64 QAM LD-based injection-locked coherent heterodyne transmission over 160 km with a spectral efficiency of 9 bit/s/Hz. IEICE Electron. Express 11(18): 20140641 (2014) - [c8]Koudai Harako, David Odeke Otuya, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
Novel ultrafast TDM demultiplexing scheme using orthogonality in coherent Nyquist pulses. ECOC 2014: 1-3 - [c7]David Odeke Otuya, Koudai Harako, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa:
A single-channel 960 Gbit/s 64 QAM orthogonal TDM transmission with a spectral efficiency of 10.0 bit/s/Hz using coherent Nyquist pulses. ECOC 2014: 1-3 - [c6]Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai, Masataka Nakazawa:
Real-time adaptive 4-64 QAM coherent optical transmission over 320 km with FPGA-based transmitter and receiver. ECOC 2014: 1-3 - [c5]Shohei Beppu, Keisuke Kasai, Masato Yoshida, Masataka Nakazawa:
2048 QAM (66 Gbit/s) single-carrier coherent optical transmission over 150 km with a potential SE of 15.3 bit/s/Hz. OFC 2014: 1-3 - [c4]David Odeke Otuya, Keisuke Kasai, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa:
1.92 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 7.5 bit/s/Hz. OFC 2014: 1-3 - 2013
- [c3]Keisuke Kasai, Yixin Wang, Masataka Nakazawa:
An LD-based ultra-low phase noise opll circuit using an optical voltage controlled oscillator. OFC/NFOEC 2013: 1-3 - [c2]David Odeke Otuya, Keisuke Kasai, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa, Tokutaka Hara, Satoshi Oikawa:
A single-channel, 1.6 Tbit/s 32 QAM coherent pulse transmission over 150 km with RZ-CW conversion and FDE techniques. OFC/NFOEC 2013: 1-3 - 2011
- [j7]Yixin Wang, Keisuke Kasai, Masataka Nakazawa:
Polarization-multiplexed, 10Gsymbol/s, 64QAM coherent transmission over 150km with OPLL-based homodyne detection employing narrow linewidth LDs. IEICE Electron. Express 8(17): 1444-1449 (2011) - [j6]Masato Yoshida, Seiji Okamoto, Tatsunori Omiya, Keisuke Kasai, Masataka Nakazawa:
256 QAM Digital Coherent Optical Transmission Using Raman Amplifiers. IEICE Trans. Commun. 94-B(2): 417-424 (2011) - 2010
- [j5]Tatsunori Omiya, Seiji Okamoto, Keisuke Kasai, Masato Yoshida, Masataka Nakazawa:
60Gbit/s 64 QAM-OFDM coherent optical transmission with a 5.3GHz bandwidth. IEICE Electron. Express 7(15): 1163-1168 (2010) - [c1]Kyoji Kawagoe, Keisuke Kasai:
STRAC: Personal Information Access Control for Emergency Systems. SERVICES 2010: 280-286
2000 – 2009
- 2008
- [j4]Keisuke Kasai, Jumpei Hongo, Hiroki Goto, Masato Yoshida, Masataka Nakazawa:
The use of a Nyquist filter for reducing an optical signal bandwidth in a coherent QAM optical transmission. IEICE Electron. Express 5(1): 6-10 (2008) - [j3]Hiroki Goto, Masato Yoshida, Tatsunori Omiya, Keisuke Kasai, Masataka Nakazawa:
Polarization and frequency division multiplexed 1Gsymbol/s, 64 QAM coherent optical transmission with 8.6bit/s/Hz spectral efficiency over 160km. IEICE Electron. Express 5(18): 776-781 (2008) - 2007
- [j2]Keisuke Kasai, Jumpei Hongo, Masato Yoshida, Masataka Nakazawa:
Optical phase-locked loop for coherent transmission over 500km using heterodyne detection with fiber lasers. IEICE Electron. Express 4(3): 77-81 (2007) - 2006
- [j1]Keisuke Kasai, Akihito Suzuki, Masato Yoshida, Masataka Nakazawa:
Performance improvement of an acetylene (C2H2) frequency-stabilized fiber laser. IEICE Electron. Express 3(22): 487-492 (2006)
Coauthor Index
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