First demonstration of multi-span transmission using phase and amplitude regeneration in PPLN-based PSA. - Takeshi Umeki; Masaki Asobe; H. Takara; Takayuki Kobayashi; Hirokazu Kubota; Hirokazu Takenouchi; Yutaka Miyamoto (OFC/NFOEC, 2013)

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)

Nonlinear phase-shift cancellation by maximum-ratio combining WDM phase-conjugate diversity lights transmitted through multi-core fiber. - Masafumi Koga; Mitsuki Moroi; H. Takara (ECOC, 2015)

Mode dependent loss equaliser and impact of MDL on PDM-16QAM few-mode fibre transmission. - T. Mizuno; H. Takara; Kohki Shibahara; Yutaka Miyamoto; Manabu Oguma; Hirotaka Ono 002; Y. Abe; Takashi Matsui; S. Matsuo; Kunimasa Saitoh; Y. Kimura (ECOC, 2015)

Optical diversity transmission with signal and its phase-conjugate lights through multi-core fiber. - Masafumi Koga; Akira Mizutori; Teppei Ohata; H. Takara (OFC, 2015)