Wavelength Conversion Using Quasi-Phase Matched LiNbO3 Waveguides. - Masaki Asobe; Yoshiki Nishida; Osamu Tadanaga; Hiroshi Miyazawa; Hiroyuki Suzuki (IEICE Trans. Electron., 2005)

763-nm Laser Light Source for Oxygen Monitoring Using Second Harmonic Generation in Direct-Bonded Quasi-Phase-Matched LiNbO3 Ridge Waveguide. - Osamu Tadanaga; Masaki Asobe; Yoshiki Nishida; Hiroshi Miyazawa; Kaoru Yoshino; Hiroyuki Suzuki (IEICE Trans. Electron., 2006)

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 (ECOC, 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 (OFC, 2014)

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)

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 (OFC, 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 (OFC, 2018)

Phase Sensitive Amplifier Using Periodically Poled LiNbO3 Waveguides and Their Applications. - Masaki Asobe; Takeshi Umeki; Osamu Tadanaga (IEICE Trans. Electron., 2018)

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 (OECC/PSC, 2019)

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)