Abstract

We demonstrated guard-band-less dense wavelength division multiplex signal amplification with a phase sensitive amplifier (PSA). The PSA consists of periodically poled lithium niobate waveguide that employs two-stage nonlinear process, namely second-harmonic generation and optical parametric amplification, which makes it possible to mitigate the crosstalk induced by the optical parametric interaction between DWDM channels. The PSA amplified 16-channel signals simultaneously with a gain of 17 dB over 12-nm wavelength range. We demonstrated a 2.5-dB signal-to-noise-ratio improvement and a low noise figure of 2.1 dB below the 3-dB quantum limit. We achieved the amplification of a 10-Gbaud quadrature phase shift keying signal with phase and amplitude regeneration.

© 2016 OAPA

In-line phase sensitive amplifier based on PPLN waveguides

Takeshi Umeki, Masaki Asobe, and Hirokazu Takenouchi
Opt. Express 21(10) 12077-12084 (2013)

First demonstration of high-order QAM signal amplification in PPLN-based phase sensitive amplifier

T. Umeki, O. Tadanaga, M. Asobe, Y. Miyamoto, and H. Takenouchi
Opt. Express 22(3) 2473-2482 (2014)

Over-30-dB gain and 1-dB noise figure phase-sensitive amplification using a pump-combiner-integrated fiber I/O PPLN module

Takushi Kazama, Takeshi Umeki, Shimpei Shimizu, Takahiro Kashiwazaki, Koji Enbutsu, Ryoichi Kasahara, Yutaka Miyamoto, and Kei Watanabe
Opt. Express 29(18) 28824-28834 (2021)

Phase sensitive amplification with noise figure below the 3 dB quantum limit using CW pumped PPLN waveguide

Masaki Asobe, Takeshi Umeki, and Osamu Tadanaga
Opt. Express 20(12) 13164-13172 (2012)

In-line phase-sensitive amplification of QPSK signal using multiple quasi-phase matched LiNbO₃ waveguide

Masaki Asobe, Takeshi Umeki, Hirokazu Takenouchi, and Yutaka Miyamoto
Opt. Express 22(22) 26642-26650 (2014)