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

Conference on Lasers and Electro-Optics

Phase-sensitive amplification of optical signal by an SOA in a nonlinear Sagnac interferometer

Yongzhang Leng, Christopher J. K. Richardson, J. Goldhar

Published May 1, 2008• 1 citation
Publisher

Abstract

Phase-sensitive amplification of picosecond optical pulses was demonstrated using an SOA as the nonlinear medium inside a Sagnac interferometer with a weak control signal. Numerical simulations using a semiconductor amplifier model are consistent with experiments.
DOI
10.1109/cleo.2008.4552379

Related papers

Nonlinear Process between Co-propagating Signal and Control Pulses in Semiconductor Optical Amplifiers

WU, Jian-Wei, BAO, Hai-Bo

A nonlinear process between co-propagating signal and control pulses has been proposed and demonstrated numerically, based on semiconductor optical amplifiers (SOA). Results show that a Gaussian signal pulse with picosecond duration can be simultaneously amplified and compressed in a SOA by utilizing a co-propagating high-intensity control pulse. To obtain high quality signal pulse with high peak power level and short pulse width, the center carrier wavelengths of two pulses should locate in the gain region of the SOA. The initial delay time between both pulses should be tuned suitably before entering the SOA.

•May 1, 2008•0 citations

Continuous phase amplification with a Sagnac interferometer

David J. Starling, P. Ben Dixon, Nathan S. Williams +2 more

We describe a phase-amplification technique using a Sagnac interferometer. We monitor the relative phase between two paths of a precisely misaligned interferometer by measuring the average position of a split-Gaussian mode in the dark port. Although we monitor only the dark port, we show that the signal varies linearly with phase and that we can obtain similar sensitivity to balanced homodyne detection. We derive the source of the amplification using classical wave optics.

arXiv:0912.2357•Physical Review A•Jul 8, 2010•140 citations

All-optical regeneration of differential phase-shift keyed signals based on phase-sensitive amplification

Kevin Croussore, Cheol-Hwan Kim, Guifang Li

All-optical regeneration of differential phase-shift keyed signals based on phase-sensitive amplification in a nonlinear fiber Sagnac interferometer is described. Nearly ideal phase regeneration can be achieved in the undepleted pump regime, with output differential phase noise limited only by fast fluctuations of the pump phase relative to the DPSK signal. Operating in the depleted pump regime offers the possibility of simultaneously regenerating both phase and amplitude information of DPSK signals while providing low noise, phase-sensitive gain.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•May 24, 2005•12 citations

Amplification of an optical pulse sequence in semiconductor optical amplifiers

Todor N. Arabadzhiev, Ivan M. Uzunov

The semiconductor optical amplifiers (SOA) are a base component in the fiber-optic transmission lines. We investigate the interaction with optical pulses of the Traveling Wave (TW) SOA having a typical parameters originated from a semi-classical model of two-level systems. An application of TW SOA as in-line amplifier for an optical pulses sequence and received "pattern" effect is shown.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Nov 6, 2003•0 citations

Phase-conjugation characteristics of semiconductor optical amplifiers

Kazuro Kikuchi, C. Lorattanasane, Koichi Saito

Phase-conjugation characteristics of a semiconductor optical amplifier (SOA) are investigated experimentally. We find that the carrier-density modulation inside the SOA distorts the phase-conjugated signal. Such distortion can be suppressed by raising the pump power and lowering the signal power. The lower limit of the signal power is, however, determined by the required signal-to-noise ratio of the phase-conjugated signal.

European Conference on Optical Communication•Jan 1, 1996•5 citations

Optical Amplification in a Nonlinear Fiber Interferometer

M.E. Marhic, S.-H. Hsia, J.-M. Jeong

Optical amplification in optical fibers by means of degenerate four-wave mixing (DFWM) is studied by classical equations. A balanced interferometer is used to mix and separate the signal and the pump. Exact solutions are obtained even with pump depletion. If the cross-phase modulation is small, the signal power gain varies as the square of the pump self-phase shift. This gain can be sizable for moderate fiber lengths and laser powers, before the onset of stimulated Raman scattering. We have experimentally verified these calculations with a Sagnac interferometer, comprising a 300 m long polarization-preserving fiber, emitting pulses with 100-200 W peak power and 100-200 nsec duration. We have measured a signal power gain of 22 (13.3 dB); this value correlated well with a pump self-phase shift of 3π/2 measured in a separate two-wavelength experiment. This system can be used for squeezing fluctuations of the signal quadrature which is not amplified. We have performed a classical derivation of squeezing, based upon a geometrical study of the transformation of the signal phasor. The results are in agreement with those of more elaborate quantum-mechanical derivations.

Annual Meeting Optical Society of America•Jan 1, 1990•0 citations
A nonlinear process between co-propagating signal and control pulses has been proposed and demonstrated numerically, based on semiconductor optical amplifiers (SOA). Results show that a Gaussian signal pulse with picosecond duration can be simultaneously amplified and compressed in a SOA by utilizing a co-propagating high-intensity control pulse. To obtain high quality signal pulse with high peak power level and short pulse width, the center carrier wavelengths of two pulses should locate in the gain region of the SOA. The initial delay time between both pulses should be tuned suitably before entering the SOA.
All-optical regeneration of differential phase-shift keyed signals based on phase-sensitive amplification in a nonlinear fiber Sagnac interferometer is described. Nearly ideal phase regeneration can be achieved in the undepleted pump regime, with output differential phase noise limited only by fast fluctuations of the pump phase relative to the DPSK signal. Operating in the depleted pump regime offers the possibility of simultaneously regenerating both phase and amplitude information of DPSK signals while providing low noise, phase-sensitive gain.
Optical amplification in optical fibers by means of degenerate four-wave mixing (DFWM) is studied by classical equations. A balanced interferometer is used to mix and separate the signal and the pump. Exact solutions are obtained even with pump depletion. If the cross-phase modulation is small, the signal power gain varies as the square of the pump self-phase shift. This gain can be sizable for moderate fiber lengths and laser powers, before the onset of stimulated Raman scattering. We have experimentally verified these calculations with a Sagnac interferometer, comprising a 300 m long polarization-preserving fiber, emitting pulses with 100-200 W peak power and 100-200 nsec duration. We have measured a signal power gain of 22 (13.3 dB); this value correlated well with a pump self-phase shift of 3π/2 measured in a separate two-wavelength experiment. This system can be used for squeezing fluctuations of the signal quadrature which is not amplified. We have performed a classical derivation of squeezing, based upon a geometrical study of the transformation of the signal phasor. The results are in agreement with those of more elaborate quantum-mechanical derivations.