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

Phase-regenerative multicasting of BPSK signals by hybrid optical phase squeezer

Takayuki Kurosu, Karen Solis-Trapala, Shu Namiki

Published Jan 1, 2014• 3 citations
OpenAlex

Abstract

We demonstrate 1-to-2 wavelength phase-regenerative multicasting of 10.75-Gb/s BPSK signals using hybrid optical phase squeezer. Employing a standard highly nonlinear fiber, efficient quadrature squeezing with 30dB extinction ratio was performed with only 160mW pump power.

Related papers

Phase regeneration of phase encoded signals by hybrid optical phase squeezer

Takayuki Kurosu, Mingyi Gao, Karen Solis-Trapala +1 more

We present a new method to perform phase regeneration of phase encoded signals. In our concept called "hybrid optical phase squeezer (HOPS)," a multilevel phase-quantized signal is synthesized through the coherent addition of a phase-conjugate copy of the signal and a phase harmonic of the signal with a frequency shifter. Unlike the conventional method by phase sensitive amplification, HOPS does not use any optical parametric gain such that only optical elements with low optical nonlinearity are necessary for optical phase quantization. In the proof-of-concept experiment, it is confirmed that a 2-level HOPS can perform quadrature squeezing with an extinction ratio of 40 dB. Simultaneous phase regeneration of two coherent wavelength-division-multiplexed 10.75-Gb/s binary phase-shift keyed signals is successfully demonstrated using a 2-level HOPS based on a semiconductor optical amplifier.

Optics Express•May 13, 2014•19 citations

Simultaneous Phase Regeneration of CoWDM BPSK Signals by Hybrid Optical Phase Squeezer

Takayuki Kurosu, Mingyi Gao, Shu Namiki

We propose a new concept of hybrid optical phase squeezer and demonstrate simultaneous phase regeneration of two CoWDM BPSK signals. A gain extinction ratio of 20dB is achieved with a pump power of only 3dBm.

Optical Fiber Communication Conference•Jan 1, 2014•0 citations

Phase noise squeezing without PM-to-AM conversion by hybrid optical phase squeezer

Takayuki Kurosu, Hung Nguyen Tan, Karen Solis-Trapala +1 more

We demonstrate, for the first time, phase regeneration of BPSK signals without phase-to-amplitude noise conversion using a hybrid optical phase squeezer. Improvement over the conventional method was confirmed through an error vector magnitude reduction.

IEEE/LEOS Summer Topical Meetings•Jul 1, 2015•0 citations

Signal phase regeneration through multiple wave coherent addition enabled by hybrid optical phase squeezer

Takayuki Kurosu, Hung Nguyen Tan, Karen Solis-Trapala +1 more

A newly proposed concept, which is called hybrid optical phase squeezer (HOPS), achieves multi-level optical phase quantization through coherent addition of two (dual-wave scheme) or three (triple-wave scheme) optical waves exploiting optical parametric processes and electro-optic modulation. The triple-wave scheme enables signal phase regeneration free from phase-to-amplitude noise transfer, which is inevitable in the dual-wave scheme. By using HOPS in the dual-wave scheme, 3-fold phase-noise reduction was achieved for 24-Gb/s QPSK signals with a slight increase of amplitude noise. On the other hand, HOPS in the triple-wave scheme allowed phase regeneration of 12-Gb/s BPSK signal with a suppression of phase-to-amplitude noise transfer.

Optics Express•Oct 14, 2015•7 citations

Quadrature Squeezing and IQ De-Multiplexing of QPSK Signals by Sideband-Assisted Dual-Pump Phase Sensitive Amplifiers

Mingyi Gao, Takayuki Kurosu, Karen Solis-Trapala +2 more

High gain extinction ratio and stable control of the phase in phase sensitive amplification are fundamental to realize either phase regeneration or quadrature squeezing of phase modulated signals in an efficient and robust manner. In this paper, we show that a combination of our previously demonstrated “sideband-assisted” dual-pump phase sensitive amplifier with a gain extinction ratio of more than 25dB, and a phase-locked loop based stabilization technique, enable efficient QPSK quadrature squeezing. Its stable operation is exploited to realize phase de-multiplexing of QPSK signals into BPSK tributaries. The phase de-multiplexed signals are evaluated through measurement of constellation diagrams, eye diagrams and more importantly, BER curves. The de-multiplexed BPSK signals exhibited an OSNR penalty of less than 1dB compared to the back-to-back BPSK signals.

IEICE Transactions on Communications•Jan 1, 2015•4 citations

Hybrid Optical Phase Quantization for All-optical Signal Processing

Takayuki Kurosu, Hung Nguyen Tan, Karen Solis-Trapala +1 more

Recent progress in all-optical signal processing based on the novel hybrid optical phase squeezer (HOPS) is presented. After reviewing the principle, we experimentally demonstrate various configurations of HOPS to phase-regenerate BPSK signal and QPSK signal.

Asia Communications and Photonics Conference•Jan 1, 2015•0 citations
We present a new method to perform phase regeneration of phase encoded signals. In our concept called "hybrid optical phase squeezer (HOPS)," a multilevel phase-quantized signal is synthesized through the coherent addition of a phase-conjugate copy of the signal and a phase harmonic of the signal with a frequency shifter. Unlike the conventional method by phase sensitive amplification, HOPS does not use any optical parametric gain such that only optical elements with low optical nonlinearity are necessary for optical phase quantization. In the proof-of-concept experiment, it is confirmed that a 2-level HOPS can perform quadrature squeezing with an extinction ratio of 40 dB. Simultaneous phase regeneration of two coherent wavelength-division-multiplexed 10.75-Gb/s binary phase-shift keyed signals is successfully demonstrated using a 2-level HOPS based on a semiconductor optical amplifier.
A newly proposed concept, which is called hybrid optical phase squeezer (HOPS), achieves multi-level optical phase quantization through coherent addition of two (dual-wave scheme) or three (triple-wave scheme) optical waves exploiting optical parametric processes and electro-optic modulation. The triple-wave scheme enables signal phase regeneration free from phase-to-amplitude noise transfer, which is inevitable in the dual-wave scheme. By using HOPS in the dual-wave scheme, 3-fold phase-noise reduction was achieved for 24-Gb/s QPSK signals with a slight increase of amplitude noise. On the other hand, HOPS in the triple-wave scheme allowed phase regeneration of 12-Gb/s BPSK signal with a suppression of phase-to-amplitude noise transfer.
High gain extinction ratio and stable control of the phase in phase sensitive amplification are fundamental to realize either phase regeneration or quadrature squeezing of phase modulated signals in an efficient and robust manner. In this paper, we show that a combination of our previously demonstrated “sideband-assisted” dual-pump phase sensitive amplifier with a gain extinction ratio of more than 25dB, and a phase-locked loop based stabilization technique, enable efficient QPSK quadrature squeezing. Its stable operation is exploited to realize phase de-multiplexing of QPSK signals into BPSK tributaries. The phase de-multiplexed signals are evaluated through measurement of constellation diagrams, eye diagrams and more importantly, BER curves. The de-multiplexed BPSK signals exhibited an OSNR penalty of less than 1dB compared to the back-to-back BPSK signals.