Koji Enbutsu

According to our database, Koji Enbutsu authored at least 23 papers between 2013 and 2024.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of three.

2024

PPLN-Based Polarization-Diverse Phase-Sensitive Amplification of 96-Gbaud PDM-PCS-64QAM Signal with Carrier-Phase-Locked Phase-Conjugated Twin Waves.

Shimpei Shimizu, Takushi Kazama, Takeshi Umeki, Koji Enbutsu, Masanori Nakamura, Masashi Abe, Takayuki Kobayashi, Yutaka Miyamoto

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2024

Cascadability of PPLN-Based Inter-Band Wavelength Conversion for Band-Switchable Multi-Band Optical Cross-Connect.

Haruka Minami, Takafumi Fukatani, Masahiro Nakagawa, Takeshi Seki, Shimpei Shimizu, Takayuki Kobayashi, Takushi Kazama, Koji Enbutsu, Takeshi Umeki, Rie Hayashi, Takeshi Kuwahara

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2024

2023

38.4-Tbps Inline-amplified Transmission Using PPLN-based Optical Parametric Amplifier over 6 THz within L- and U-bands.

Shimpei Shimizu, Takayuki Kobayashi, Akira Kawai, Takushi Kazama, Masanori Nakamura, Koji Enbutsu, Takahiro Kashiwazaki, Masashi Abe, Takeshi Umeki, Yutaka Miyamoto, Tomoyuki Kato, Yu Tanaka, Takeshi Hoshida

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2023

Experimental Demonstration of Cascadable PPLN-Based Inter-Band Wavelength Converters for Band-Switchable Multi-Band Optical Cross-Connect.

Haruka Minami, Kenta Hirose, Takafumi Fukatani, Masahiro Nakagawa, Takeshi Seki, Shimpei Shimizu, Takayuki Kobayashi, Takushi Kazama, Koji Enbutsu, Kei Watanabe, Takeshi Umeki, Takashi Miyamura, Takeshi Kuwahara

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2023

2022

Channel Arrangement Design in Lumped Amplified WDM Transmission over NZ-DSF Link with Nonlinearity Mitigation Using Optical Phase Conjugation.

Shimpei Shimizu, Takayuki Kobayashi, Takeshi Umeki, Takushi Kazama, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto

IEICE Trans. Commun., 2022

Generation of Carrier-Synchronized PDM Signal-Idler Pair for Polarization-Independent Phase-Sensitive Amplification.

Shimpei Shimizu, Takushi Kazama, Takeshi Umeki, Takayuki Kobayashi, Koji Enbutsu, Kei Watanabe, Yutaka Miyamoto

Proceedings of the 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022

2021

Wideband PPLN-based optical parametric amplifiers for scalable optical transport network.

Yutaka Miyamoto, Takayuki Kobayashi, Takeshi Umeki, Takushi Kazama, Koji Enbutsu, Shimpei Shimizu, Ryoichi Kasahara

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2021

8-Tbps (20 × 400 Gbps) Unrepeated Transmission over 80 km with 2-THz PPLN-Based Phase-Sensitive Amplification Using Precise Chromatic Dispersion Pre-Compensation.

Shimpei Shimizu, Takayuki Kobayashi, Takushi Kazama, Takeshi Umeki, Masanori Nakamura, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto

Proceedings of the European Conference on Optical Communication, 2021

2020

Nonlinearity Mitigation of PDM-16QAM Signals Using Multiple CSI-OPCs in Ultra-Long-Haul Transmission without Excess Penalty.

Takeshi Umeki, Takayuki Kobayashi, Akihide Sano, Takuya Ikuta, Masashi Abe, Takushi Kazama, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto

IEICE Trans. Commun., 2020

PPLN-Based Low-Noise Phase Sensitive Amplification Using an Optical Phase-Locked Pump.

Takushi Kazama, Takeshi Umeki, Yasuhiro Okamura, Koji Enbutsu, Osamu Tadanaga, Atsushi Takada, Ryoichi Kasahara

IEICE Trans. Commun., 2020

Collective and synchronous dynamics of photonic spiking neurons.

Takahiro Inagaki, Kensuke Inaba, Timothée G. Leleu, Toshimori Honjo, Takuya Ikuta, Koji Enbutsu, Takeshi Umeki, Ryoichi Kasahara, Kazuyuki Aihara, Hiroki Takesue

CoRR, 2020

Gain Ripple and Passband Narrowing Due to Residual Chromatic Dispersion in Non-Degenerate Phase-Sensitive Amplifiers.

Shimpei Shimizu, Takushi Kazama, Takayuki Kobayashi, Takeshi Umeki, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2020

2019

Nonlinearity mitigation of PDM-16QAM signal using multiple CSI-OPCs in ultra-long haul transmission without excess penalty.

Takeshi Umeki, Takayuki Kobayashi, Akihide Sano, Takuya Ikuta, Masashi Abe, Takushi Kazama, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto

Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

1.4μm-1.6μm Wavelength Conversion Using Multiple Quasi-Phase Matching LiNbO3.

Saroeun Punhavan, Masato Kato, Keisuke Sugiyama, Masaki Asobe, Takeshi Umeki, Koji Enbutsu, Takushi Kazama, Takahiro Kashiwazaki, Ryoichi Kasahara

Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

Low-Noise Phase Sensitive Amplification Using an Optical Phase-Locked Pump.

Takushi Kazama, Takeshi Umeki, Yasuhiro Okamura, Koji Enbutsu, Osamu Tadanaga, Atsushi Takada, Ryoichi Kasahara

Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

2018

Scaling advantages of all-to-all connectivity in physical annealers: the Coherent Ising Machine vs. D-Wave 2000Q.

Ryan Hamerly, Takahiro Inagaki, Peter L. McMahon, Davide Venturelli, Alireza Marandi, Tatsuhiro Onodera, Edwin Ng, Carsten Langrock, Kensuke Inaba, Toshimori Honjo, Koji Enbutsu, Takeshi Umeki, Ryoichi Kasahara, Shoko Utsunomiya, Satoshi Kako, Ken-ichi Kawarabayashi, Robert L. Byer, Martin M. Fejer, Hideo Mabuchi, Eleanor Gilbert Rieffel, Hiroki Takesue, Yoshihisa Yamamoto

CoRR, 2018

Polarization-diversity In-line Phase Sensitive Amplifier for Simultaneous Amplification of Fiber-transmitted WDM PDM-16QAM Signals.

Takeshi Umeki, Takushi Kazama, Takayuki Kobayashi, Shigehiro Takasaka, Yasuhiro Okamura, Koji Enbutsu, Osamu Tadanaga, Hirokazu Takenouchi, Ryuichi Sugizaki, Atsushi Takada, Ryoichi Kasahara, Yutaka Miyamoto

Proceedings of the Optical Fiber Communications Conference and Exposition, 2018

Towards Practical Implementation of Optical Parametric Amplifiers Based on PPLN Waveguides.

Takeshi Umeki, Takushi Kazama, Takayuki Kobayashi, Koji Enbutsu, Osamu Tadanaga, Hirokazu Takenouchi, Ryoichi Kasahara, Yutaka Miyamoto

Proceedings of the Optical Fiber Communications Conference and Exposition, 2018

2016

PPLN-Based Low-Noise In-Line Phase Sensitive Amplifier with Highly Sensitive Carrier-Recovery System.

Koji Enbutsu, Takeshi Umeki, Osamu Tadanaga, Masaki Asobe, Hirokazu Takenouchi

IEICE Trans. Commun., 2016

Low-noise phase-sensitive amplifier for guard-band-less 16-channel DWDM signal using PPLN waveguides.

Takushi Kazama, Takeshi Umeki, Masashi Abe, Koji Enbutsu, Yutaka Miyamoto, Hirokazu Takenouchi

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2016

2014

Low noise and regenerative phase sensitive amplifier based on PPLN waveguides.

Takeshi Umeki, Masaki Asobe, H. Takara, Osamu Tadanaga, Koji Enbutsu, Yutaka Miyamoto, Hirokazu Takenouchi

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2014

First demonstration of PDM signal amplification using PPLN-based polarization-independent phase sensitive amplifier.

Takeshi Umeki, Takushi Kazama, Osamu Tadanaga, Koji Enbutsu, Masaki Asobe, Yutaka Miyamoto, Hirokazu Takenouchi

Proceedings of the European Conference on Optical Communication, 2014

2013

Real-Time N₂O Gas Detection System for Agricultural Production Using a 4.6-µm-Band Laser Source Based on a Periodically Poled LiNbO₃ Ridge Waveguide.

Akio Tokura, Masaki Asobe, Koji Enbutsu, Toshihiro Yoshihara, Shin-nosuke Hashida, Hirokazu Takenouchi

Sensors, 2013