Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

The Japan Society of Applied Physics

In-line phase sensitive amplification of QPSK signal using multiple QPM LiNO3 waveguide

Masaki Asobe

Published Feb 6, 2014• 0 citations
OpenAlex

Related papers

Phase-sensitive QPSK channel phase quantization by amplifying the fourth-harmonic idler using counter-propagating Brillouin amplification

Ahmed Almaiman, Yinwen Cao, A. Mohajerin-Ariaei +12 more

Optics Communications•Apr 16, 2018•14 citations

Phase-sensitive amplification using PPLN waveguide based optical integrated circuit

Takushi Kazama

The Japan Society of Applied Physics•Jul 17, 2015•0 citations

Phase-sensitive amplification using PPLN integrated optical waveguide circuit

拓志 風間, 毅伺 梅木, 晃次 圓佛

IEICE technical report. Speech•Oct 29, 2015•0 citations

Phase-sensitive amplification using PPLN integrated optical waveguide circuit

Takushi Kazama, Takeshi Umeki, Koji Enbutsu +2 more

IEICE Technical Report; IEICE Tech. Rep.•Oct 22, 2015•0 citations

In-line phase-sensitive amplification of QPSK signal using multiple quasi-phase matched LiNbO_3 waveguide

Masaki Asobe, Takeshi Umeki, Hirokazu Takenouchi +1 more

Phase-sensitive amplifiers (PSA) using periodically poled (PPLN) LiNbO₃ waveguides are promising as low-noise optical amplifiers. However, it is difficult to realize in-line operation for multi-level phase modulated signals using a PPLN based PSA with the conventional configuration. In this paper, we report a PPLN based in-line PSA that can regenerate quadrature phase shift keying (QPSK) signals. Multi-stage frequency mixing in a multiple quasi-phase matched LiNbO₃waveguide allows carrier phase recovery from a QPSK signal. Non-degenerate parametric amplification enables the phase-sensitive amplification of a QPSK signal. Amplitude and phase regeneration is examined utilizing gain saturation and phase squeezing capability.

Optics Express•Oct 21, 2014•15 citations

Parametric optical amplification using a reflective multiple quasi-phase-matched LiNbO 3 waveguide module

Masaki Asobe, Yuki Kawabata, Daiki Yagi +3 more

Optical parametric amplification (OPA) in the S-band with a compact configuration was demonstrated using a reflective multiple quasi-phase-matched (M-QPM) LiNbO 3 waveguide module. The reflective-module-assembled LiNbO 3 waveguide has two QPM peaks and a built-in mirror that reflects only the second harmonic. These features make it possible to perform second harmonic pump generation and OPA under different phase-matching conditions using a single device. The idler light generated in the module retains the phase information from the signal light and is used to evaluate signal quality.

Optics Continuum•Jan 31, 2024•0 citations
Phase-sensitive amplifiers (PSA) using periodically poled (PPLN) LiNbO₃ waveguides are promising as low-noise optical amplifiers. However, it is difficult to realize in-line operation for multi-level phase modulated signals using a PPLN based PSA with the conventional configuration. In this paper, we report a PPLN based in-line PSA that can regenerate quadrature phase shift keying (QPSK) signals. Multi-stage frequency mixing in a multiple quasi-phase matched LiNbO₃waveguide allows carrier phase recovery from a QPSK signal. Non-degenerate parametric amplification enables the phase-sensitive amplification of a QPSK signal. Amplitude and phase regeneration is examined utilizing gain saturation and phase squeezing capability.
Optical parametric amplification (OPA) in the S-band with a compact configuration was demonstrated using a reflective multiple quasi-phase-matched (M-QPM) LiNbO 3 waveguide module. The reflective-module-assembled LiNbO 3 waveguide has two QPM peaks and a built-in mirror that reflects only the second harmonic. These features make it possible to perform second harmonic pump generation and OPA under different phase-matching conditions using a single device. The idler light generated in the module retains the phase information from the signal light and is used to evaluate signal quality.