The following publications are possibly variants of this publication:
- Low-Noise Phase Sensitive Amplification Using an Optical Phase-Locked PumpTakushi Kazama, Takeshi Umeki, Yasuhiro Okamura, Koji Enbutsu, Osamu Tadanaga, Atsushi Takada, Ryoichi Kasahara. ps 2019: 1-3 [doi]
- First demonstration of PDM signal amplification using PPLN-based polarization-independent phase sensitive amplifierTakeshi Umeki, Takushi Kazama, Osamu Tadanaga, Koji Enbutsu, Masaki Asobe, Yutaka Miyamoto, Hirokazu Takenouchi. ecoc 2014: 1-3 [doi]
- Low noise and regenerative phase sensitive amplifier based on PPLN waveguidesTakeshi Umeki, Masaki Asobe, H. Takara, Osamu Tadanaga, Koji Enbutsu, Y. Miyamoto, Hirokazu Takenouchi. ofc 2014: 1-3 [doi]
- PPLN-based low-noise in-line phase sensitive amplifier with highly sensitive carrier-recovery systemKoji Enbutsu, Takeshi Umeki, Osamu Tadanaga, Hirokazu Takenouchi, Masaki Asobe. apcc 2015: 666-669 [doi]
- PPLN-Based Low-Noise In-Line Phase Sensitive Amplifier with Highly Sensitive Carrier-Recovery SystemKoji Enbutsu, Takeshi Umeki, Osamu Tadanaga, Masaki Asobe, Hirokazu Takenouchi. ieicet, 99-B(8):1727-1733, 2016. [doi]
- PPLN based phase sensitive amplifiers and their applicationsMasaki Asobe, Takeshi Umeki, Hirokazu Takenouchi. ofc 2013: 1-3 [doi]
- 8-Tbps (20 × 400 Gbps) Unrepeated Transmission over 80 km with 2-THz PPLN-Based Phase-Sensitive Amplification Using Precise Chromatic Dispersion Pre-CompensationShimpei Shimizu, Takayuki Kobayashi, Takushi Kazama, Takeshi Umeki, Masanori Nakamura, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto. ecoc 2021: 1-4 [doi]
- Low-noise phase-sensitive amplifier for guard-band-less 16-channel DWDM signal using PPLN waveguidesTakushi Kazama, Takeshi Umeki, Masashi Abe, Koji Enbutsu, Yutaka Miyamoto, Hirokazu Takenouchi. ofc 2016: 1-3 [doi]