Keisuke Kasai

发表

QAM quantum noise stream cipher using digital coherent optical transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2015, 2015 49th Asilomar Conference on Signals, Systems and Computers.

Performance improvement of an acetylene (C2H2) frequency-stabilized fiber laser

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2006, IEICE Electron. Express.

Optical and wireless-integrated next-generation access network based on coherent technologies

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2016, SPIE OPTO.

The use of a Nyquist filter for reducing an optical signal bandwidth in a coherent QAM optical transmission

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2008, IEICE Electron. Express.

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

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2018, 2018 Optical Fiber Communications Conference and Exposition (OFC).

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

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2016, 2016 Optical Fiber Communications Conference and Exhibition (OFC).

GAWBS Noise Characteristics in Digital Coherent Transmission in Various Optical Fibers

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2019, 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC).

Experimental and Theoretical Analyses of GAWBS Phase Noise in Multi-Core Fiber for Digital Coherent Transmission

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2020, 2020 Optical Fiber Communications Conference and Exhibition (OFC).

10 GHz, 6.2 ps Transform-Limited Coherent Optical Pulse Generation from a 1.55 μm, Self-Injection Gain-Switched DFB-LD

Masataka Nakazawa, Keisuke Kasai, 2020, 2020 Optical Fiber Communications Conference and Exhibition (OFC).

STRAC: Personal Information Access Control for Emergency Systems

Kyoji Kawagoe, Keisuke Kasai, 2010, 2010 6th World Congress on Services.

A Single-Channel 40 Gbit/s Digital Coherent QAM Quantum Stream Cipher Transmission over 480 km

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, 2014 Asia Communications and Photonics Conference (ACP).

First demonstration of digital coherent transmission in a deployed ROADM network with a 120 Gbit/s polarization-multiplexed 64 QAM signal

Naoya Wada, Yoshinari Awaji, Masaki Shiraiwa, 2015, IEICE Electron. Express.

Situation, Team and Role based Access Control

Kyoji Kawagoe, Keisuke Kasai, 2011 .

Optical phase-locked loop for coherent transmission over 500km using heterodyne detection with fiber lasers

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2007, IEICE Electron. Express.

Demonstration of on-line bi-directional 10-RRHS with an 80 GBIT/S/RRH capacity using 256 QAM WDM coherent transmission for next generation mobile fronthaul

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2019 .

Single-carrier 216 Gbit/s, 12 Gsymbol/s 512 QAM coherent transmission over 160 km with injection-locked homodyne detection

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2017, 2017 Optical Fiber Communications Conference and Exhibition (OFC).

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

Naoya Wada, Yoshinari Awaji, Masaki Shiraiwa, 2017, 2017 European Conference on Optical Communication (ECOC).

Digital Coherent Optical Access Technologies for Beyond 5G Network

Katsumi Iwatsuki, Masataka Nakazawa, Masato Yoshida, 2020, 2020 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT).

A New Optical Phase-Locked System Between Ultrashort Pulses for 640 Gbaud Nyquist OTDM Coherent QAM Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2017, 2017 European Conference on Optical Communication (ECOC).

Real-time 10 Gbit/s-16 QAM quantum stream cipher transmission over 320 km with FPGA-based transmitter and receiver

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

256 QAM Digital Coherent Optical Transmission Using Raman Amplifiers

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2011, IEICE Trans. Commun..

Single-channel 3.84 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with frequency-stabilized and mode-locked laser

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2017, 2017 Optical Fiber Communications Conference and Exhibition (OFC).

256 QAM (polarization-multiplexed, 5 Gsymbol/s) coherent transmission with an injection-locked homodyne detection technique

Masataka Nakazawa, Keisuke Kasai, Yixin Wang, 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

60Gbit/s 64 QAM-OFDM coherent optical transmission with a 5.3GHz bandwidth

Masataka Nakazawa, Keisuke Kasai, Seiji Okamoto, 2010, IEICE Electron. Express.

1.92 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 7.5 bit/s/Hz

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2014, OFC 2014.

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

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2017, 2017 Optical Fiber Communications Conference and Exhibition (OFC).

Real-time adaptive 4–64 QAM coherent optical transmission over 320 km with FPGA-based transmitter and receiver

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, 2014 The European Conference on Optical Communication (ECOC).

QAM Quantum Noise Stream Cipher Transmission Over 100 km With Continuous Variable Quantum Key Distribution

Ryo Namiki, Masato Yoshida, Toshihiko Hirooka, 2017, IEEE Journal of Quantum Electronics.

Observation of Guided Acoustic-Wave Brillouin Scattering and its Digital Compensation in Coherent QAM Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, 2018 Optical Fiber Communications Conference and Exposition (OFC).

Dual-Polarization On-Line 256 and 512 QAM Digital Coherent Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2019, 2019 Optical Fiber Communications Conference and Exhibition (OFC).

Real-time adaptive 4–64 QAM, 20–60 Gbit/s quantum noise stream cipher transmission over 320 km with FPGA-based transmitter and receiver

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2015, 2015 European Conference on Optical Communication (ECOC).

Backward-Rayleigh-Scattering Suppressed 160 Gbit/s 256 QAM Injection-Locked Bidirectional Coherent Transmission for Next Generation Mobile Fronthaul

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, 2018 European Conference on Optical Communication (ECOC).

QAM quantum stream cipher using digital coherent optical transmission.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, Optics express.

80 Gbit/s/ch, 256 QAM Digital Coherent Optical Transmission System with Injection-Locking for Next Generation Mobile Fronthaul Network

Katsumi Iwatsuki, Masataka Nakazawa, Masato Yoshida, 2017, 2017 European Conference on Optical Communication (ECOC).

Novel RZ-CW conversion scheme for ultra multi-level, high-speed coherent OTDM transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2011, 2011 37th European Conference and Exhibition on Optical Communication.

Polarization-multiplexed, 10Gsymbol/s, 64QAM coherent transmission over 150km with OPLL-based homodyne detection employing narrow linewidth LDs

Masataka Nakazawa, Keisuke Kasai, Yixin Wang, 2011, IEICE Electron. Express.

A C2H2 frequency-stabilized erbium-doped fiber laser and its application to coherent communication

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2007, SPIE LASE.

Polarization and frequency division multiplexed 1Gsymbol/s, 64 QAM coherent optical transmission with 8.6bit/s/Hz spectral efficiency over 160km

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2008, IEICE Electron. Express.

2048 QAM (66 Gbit/s) single-carrier coherent optical transmission over 150 km with a potential SE of 15.3 bit/s/Hz

Masataka Nakazawa, Keisuke Kasai, Shohei Beppu, 2014, OFC.

Real-time FPGA-based coherent optical receiver for 1 Gsymbol/s, 64 QAM transmission

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.

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

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

Full C-band, mode-hop-free wavelength-tunable laser diode with a linewidth of 8 kHz and a RIN of −130 dB/Hz

Masataka Nakazawa, Keisuke Kasai, Takashi Endo, 2017, 2017 Optical Fiber Communications Conference and Exhibition (OFC).

10 Tbit/s QAM Quantum Noise Stream Cipher Coherent Transmission over 160 km

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2020, 2020 Optical Fiber Communications Conference and Exhibition (OFC).

Injection-locked Homodyne Detection for Higher-order QAM Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, 2018 Optical Fiber Communications Conference and Exposition (OFC).

Object wave retrieval in generalized phase-shifting digital holography using a fringe normalization approach

Nobukazu Yoshikawa, Syouma Namiki, Keisuke Kasai, 2017 .

Adaptive 4~64 QAM real-time coherent optical transmission over 320 km with FPGA-based transmitter and receiver.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, Optics express.

60 Gbit/s, 64 QAM LD-based injection-locked coherent heterodyne transmission over 160 km with a spectral efficiency of 9 bit/s/Hz

Yixin Wang, Masataka Nakazawa, Keisuke Kasai, 2014, IEICE Electron. Express.

10 Tbit/s QAM Quantum Noise Stream Cipher Coherent Transmission Over 160 Km

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2020, Journal of Lightwave Technology.

A 13C2H2 Frequency-Stabilized, Polarization-Maintained 1.54 µm Erbium Fiber Ring Laser with a New Feedback System

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2006 .

Experimental and Numerical Comparison of Probabilistically-Shaped 4096 QAM and Uniformly-Shaped 1024 QAM in All-Raman Amplified 160 km Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, 2018 Optical Fiber Communications Conference and Exposition (OFC).

Real-Time 256 QAM Bi-directional Coherent Transmission in Next Generation Mobile Fronthaul

GAWBS Noise Correlation Between Cores in Four-Core Fiber

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

64 Gbit/s, 256 QAM Transmission Through Coherent Optical-Wireless Link at 61 GHz Using Simple and High OSNR Carrier Frequency Converter

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

Broadband Dynamic Injection-Locking Performance of Fabry-Perot LD and Its Application to Coherent Homodyne Receiver

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

An LD-based ultra-low phase noise opll circuit using an optical voltage controlled oscillator

Masataka Nakazawa, Keisuke Kasai, Yixin Wang, 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

200 Gbit/s, 10 Gsymbol/s-1024 QAM Injection Locked Coherent Transmission over 160 km with a Pilot-assisted Adaptive Equalizer

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2018, 2018 23rd Opto-Electronics and Communications Conference (OECC).

448 Gbit/s, 32 Gbaud 128 QAM coherent transmission over 150 km with a potential spectral efficiency of 10.7 bit/s/Hz.

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2015, Optics express.

320 Gbit/s, 20 Gsymbol/s 256 QAM coherent transmission over 160 km by using injection-locked local oscillator.

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2016, Optics express.

1024 QAM, 7-core (60 Gbit/s x 7) fiber transmission over 55 km with an aggregate potential spectral efficiency of 109 bit/s/Hz.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2015, Optics express.

42.3 Tbit/s, 18 Gbaud 64 QAM WDM coherent transmission over 160 km in the C-band using an injection-locked homodyne receiver with a spectral efficiency of 9 bit/s/Hz.

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2017, Optics express.

C2H2 absolutely optical frequency-stabilized and 40 GHz repetition-rate-stabilized, regeneratively mode-locked picosecond erbium fiber laser at 1.53 µm

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2008, 2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference.

A C 2 H 2 frequency-stabilized laser diode with a linewidth of 4 kHz and its application to an optical phase-locked loop

Masataka Nakazawa, Keisuke Kasai, 2010 .

Polarization-multiplexed 1 Gsymbol/s, 128 QAM (14 Gbit/s) coherent optical transmission over 160 km using a 1.4 GHz Nyquist filter

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2008, OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference.

Single-channel 3.84 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 10.6 bit/s/Hz.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, Optics express.

Polarization-Multiplexed 1 Gsymbol/s, 64 QAM (12 Gbit/s) Coherent Optical Transmission over 150 km with an Optical Bandwidth of 2 GHz

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2007, OFC 2007.

Reverse Phase Modulation Technique for GAWBS Noise Error Floor Elimination in 1024 QAM-160 km Digital Coherent Transmission

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2018, 2018 23rd Opto-Electronics and Communications Conference (OECC).

512 QAM (54 Gbit/s) coherent optical transmission over 150 km with an optical bandwidth of 4.1 GHz

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2010, 36th European Conference and Exhibition on Optical Communication.

120 Gbit/s, polarization-multiplexed 10 Gsymbol/s, 64 QAM coherent transmission over 150 km using an optical voltage controlled oscillator.

Masataka Nakazawa, Keisuke Kasai, Tatsunori Omiya, 2013, Optics express.

Frequency division multiplexed 1 Gsymbol/s, 64 QAM coherent optical transmission with a spectral efficiency of 8.6 bit/s/Hz

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2008, 2008 34th European Conference on Optical Communication.

Single-Channel 7.68 Tbit/s, 64 QAM Coherent Nyquist Pulse Transmission over 150 km with a Spectral Efficiency of 9.7 bit/s/Hz

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2018, 2018 23rd Opto-Electronics and Communications Conference (OECC).

GAWBS Noise Characteristics in Digital Coherent Transmission in Various Optical Fibers

FM-eliminated C2H2 frequency-stabilized laser diode with an RIN of -135 dB/Hz and a linewidth of 4 kHz.

Masataka Nakazawa, Keisuke Kasai, 2009, Optics letters.

20 msymbol/s, 64 and 128 QAM coherent optical transmission over 525km using heterodyne detection with frequency-stabilised laser

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2006 .

Single-channel 400 Gbit/s, OTDM-32 RZ/QAM coherent transmission over 225 km using an optical phase-locked loop technique

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

High-performance TDM demultiplexing of coherent Nyquist pulses using time-domain orthogonality.

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2014, Optics express.

8 kHz linewidth, 50 mW output, full C-band wavelength tunable DFB LD array with self-optical feedback.

Masataka Nakazawa, Keisuke Kasai, Hiroyuki Ishii, 2018, Optics express.

140 Gbit/s coherent optical transmission over 150 km with a 10 Gsymbol/s polarization-multiplexed 128 QAM signal

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

80 Gbit/s, 256 QAM coherent transmission over 150 km with an injection-locked homodyne receiver.

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2015, Optics express.

Single-channel 1.92 Tbit/s, Pol-Mux-64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 7.5 bit/s/Hz.

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, 2014, Optics express.

Novel ultrafast TDM demultiplexing scheme using orthogonality in coherent Nyquist pulses

Masataka Nakazawa, Toshihiko Hirooka, Keisuke Kasai, 2014, 2014 The European Conference on Optical Communication (ECOC).

1.55 μm hydrogen cyanide optical frequency-stabilized and 10 GHz repetition-rate-stabilized mode-locked fiber laser.

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2016, Optics express.

256 QAM (64 Gbit/s) coherent optical transmission over 160 km with an optical bandwidth of 5.4 GHz

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

120 Gbit/s injection-locked homodyne coherent transmission of polarization-multiplexed 64 QAM signals over 150 km.

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2014, Optics express.

20 Msymbol/s, 128 QAM Coherent Optical Transmission over 500 km Using Heterodyne Detection with Frequency-stabilized Laser

Masataka Nakazawa, Masato Yoshida, Keisuke Kasai, 2006, 2006 European Conference on Optical Communications.