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2020 – today
- 2024
[c17]Haruka Minami, Takafumi Fukatani, Masahiro Nakagawa, Takeshi Seki, Shimpei Shimizu, Takayuki Kobayashi, Takushi Kazama, Koji Enbutsu, Takeshi Umeki, Rie Hayashi, Takeshi Kuwahara:
Cascadability of PPLN-Based Inter-Band Wavelength Conversion for Band-Switchable Multi-Band Optical Cross-Connect. OFC 2024: 1-3- [c16]Shimpei Shimizu, Takushi Kazama, Takeshi Umeki, Koji Enbutsu, Masanori Nakamura, Masashi Abe, Takayuki Kobayashi, Yutaka Miyamoto:
PPLN-Based Polarization-Diverse Phase-Sensitive Amplification of 96-Gbaud PDM-PCS-64QAM Signal with Carrier-Phase-Locked Phase-Conjugated Twin Waves. OFC 2024: 1-3 - 2023
- [c15]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:
Experimental Demonstration of Cascadable PPLN-Based Inter-Band Wavelength Converters for Band-Switchable Multi-Band Optical Cross-Connect. OFC 2023: 1-3 - [c14]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:
38.4-Tbps Inline-amplified Transmission Using PPLN-based Optical Parametric Amplifier over 6 THz within L- and U-bands. OFC 2023: 1-3 - 2022
- [j5]Shimpei Shimizu
, Takayuki Kobayashi, Takeshi Umeki, Takushi Kazama, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto:
Channel Arrangement Design in Lumped Amplified WDM Transmission over NZ-DSF Link with Nonlinearity Mitigation Using Optical Phase Conjugation. IEICE Trans. Commun. 105-B(7): 805-813 (2022) - [c13]Shimpei Shimizu, Takushi Kazama, Takeshi Umeki, Takayuki Kobayashi, Koji Enbutsu, Kei Watanabe, Yutaka Miyamoto:
Generation of Carrier-Synchronized PDM Signal-Idler Pair for Polarization-Independent Phase-Sensitive Amplification. OECC/PSC 2022: 1-4 - 2021
- [c12]Shimpei Shimizu, Takayuki Kobayashi, Takushi Kazama, Takeshi Umeki, Masanori Nakamura, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto:
8-Tbps (20 × 400 Gbps) Unrepeated Transmission over 80 km with 2-THz PPLN-Based Phase-Sensitive Amplification Using Precise Chromatic Dispersion Pre-Compensation. ECOC 2021: 1-4 - [c11]Yutaka Miyamoto, Takayuki Kobayashi, Takeshi Umeki, Takushi Kazama, Koji Enbutsu, Shimpei Shimizu, Ryoichi Kasahara:
Wideband PPLN-based optical parametric amplifiers for scalable optical transport network. OFC 2021: 1-3 - 2020
- [j4]Takeshi Umeki, Takayuki Kobayashi, Akihide Sano, Takuya Ikuta, Masashi Abe, Takushi Kazama, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto:
Nonlinearity Mitigation of PDM-16QAM Signals Using Multiple CSI-OPCs in Ultra-Long-Haul Transmission without Excess Penalty. IEICE Trans. Commun. 103-B(11): 1226-1232 (2020) - [j3]Takushi Kazama, Takeshi Umeki, Yasuhiro Okamura, Koji Enbutsu, Osamu Tadanaga, Atsushi Takada, Ryoichi Kasahara:
PPLN-Based Low-Noise Phase Sensitive Amplification Using an Optical Phase-Locked Pump. IEICE Trans. Commun. 103-B(11): 1265-1271 (2020) - [c10]Shimpei Shimizu, Takushi Kazama, Takayuki Kobayashi, Takeshi Umeki, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto:
Gain Ripple and Passband Narrowing Due to Residual Chromatic Dispersion in Non-Degenerate Phase-Sensitive Amplifiers. OFC 2020: 1-3 - [i2]Takahiro Inagaki, Kensuke Inaba, Timothée G. Leleu, Toshimori Honjo, Takuya Ikuta, Koji Enbutsu, Takeshi Umeki, Ryoichi Kasahara, Kazuyuki Aihara, Hiroki Takesue:
Collective and synchronous dynamics of photonic spiking neurons. CoRR abs/2009.11454 (2020)
2010 – 2019
- 2019
- [c9]Takushi Kazama, Takeshi Umeki, Yasuhiro Okamura, Koji Enbutsu, Osamu Tadanaga, Atsushi Takada, Ryoichi Kasahara:
Low-Noise Phase Sensitive Amplification Using an Optical Phase-Locked Pump. OECC/PSC 2019: 1-3 - [c8]Saroeun Punhavan, Masato Kato, Keisuke Sugiyama, Masaki Asobe, Takeshi Umeki, Koji Enbutsu, Takushi Kazama, Takahiro Kashiwazaki, Ryoichi Kasahara:
1.4μm-1.6μm Wavelength Conversion Using Multiple Quasi-Phase Matching LiNbO3. OECC/PSC 2019: 1-3 - [c7]Takeshi Umeki, Takayuki Kobayashi, Akihide Sano, Takuya Ikuta, Masashi Abe, Takushi Kazama, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto:
Nonlinearity mitigation of PDM-16QAM signal using multiple CSI-OPCs in ultra-long haul transmission without excess penalty. OECC/PSC 2019: 1-3 - 2018
- [c6]Takeshi Umeki, Takushi Kazama, Takayuki Kobayashi, Koji Enbutsu, Osamu Tadanaga, Hirokazu Takenouchi, Ryoichi Kasahara, Yutaka Miyamoto:
Towards Practical Implementation of Optical Parametric Amplifiers Based on PPLN Waveguides. OFC 2018: 1-3 - [c5]Takeshi Umeki, Takushi Kazama, Takayuki Kobayashi, Shigehiro Takasaka, Yasuhiro Okamura, Koji Enbutsu, Osamu Tadanaga, Hirokazu Takenouchi, Ryuichi Sugizaki, Atsushi Takada, Ryoichi Kasahara, Yutaka Miyamoto:
Polarization-diversity In-line Phase Sensitive Amplifier for Simultaneous Amplification of Fiber-transmitted WDM PDM-16QAM Signals. OFC 2018: 1-3 - [i1]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:
Scaling advantages of all-to-all connectivity in physical annealers: the Coherent Ising Machine vs. D-Wave 2000Q. CoRR abs/1805.05217 (2018) - 2016
- [j2]Koji Enbutsu, Takeshi Umeki, Osamu Tadanaga, Masaki Asobe, Hirokazu Takenouchi:
PPLN-Based Low-Noise In-Line Phase Sensitive Amplifier with Highly Sensitive Carrier-Recovery System. IEICE Trans. Commun. 99-B(8): 1727-1733 (2016) - [c4]Takushi Kazama, Takeshi Umeki, Masashi Abe, Koji Enbutsu, Yutaka Miyamoto, Hirokazu Takenouchi:
Low-noise phase-sensitive amplifier for guard-band-less 16-channel DWDM signal using PPLN waveguides. OFC 2016: 1-3 - 2015
- [c3]Koji Enbutsu, Takeshi Umeki, Osamu Tadanaga, Hirokazu Takenouchi, Masaki Asobe:
PPLN-based low-noise in-line phase sensitive amplifier with highly sensitive carrier-recovery system. APCC 2015: 666-669 - 2014
- [c2]Takeshi Umeki, Takushi Kazama, Osamu Tadanaga, Koji Enbutsu, Masaki Asobe, Yutaka Miyamoto, Hirokazu Takenouchi:
First demonstration of PDM signal amplification using PPLN-based polarization-independent phase sensitive amplifier. ECOC 2014: 1-3 - [c1]Takeshi Umeki, Masaki Asobe, H. Takara, Osamu Tadanaga, Koji Enbutsu, Yutaka Miyamoto, Hirokazu Takenouchi:
Low noise and regenerative phase sensitive amplifier based on PPLN waveguides. OFC 2014: 1-3 - 2013
- [j1]Akio Tokura, Masaki Asobe, Koji Enbutsu, Toshihiro Yoshihara, Shin-nosuke Hashida, Hirokazu Takenouchi:
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. Sensors 13(8): 9999-10013 (2013)
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