Nonlinearity mitigation in phase-sensitively amplified optical transmission links
Licentiate thesis, 2019
the amplification can be reduced using phase-sensitive amplifier (PSA) whose quantum-limited noise figure is 0 dB. PSAs can also compensate
for the nonlinear distortions from the optical fiber with copier-PSA implementation. At the transmitter, a copier which is nothing but a
phase-insensitive amplifier is used to create a conjugated copy of the signal. The signal and idler are co-propagated in the span, experiencing
correlated nonlinear distortions. The nonlinear distortions are reduced by the all-optical coherent superposition of the signal and idler in the
In this work, an analytical investigation is performed for the nonlinearity mitigation using the PSAs, by calculating the residual nonlinear
distortion after the coherent superposition in PSAs. The optical bandwidth and the dispersion map dependence on the nonlinearity mitigation
in the PSAs are analytically and experimentally studied. A modified Volterra nonlinear equalizer (VNLE) is used to reduce the residual nonlinear
distortions after PSAs. Experiments were performed to show that PSAs can mitigate cross-phase modulation (XPM), which was evident
by observing the constellation diagrams. The maximum allowed launch power increase was also measured to quantify the XPM mitigation. To
the best of our knowledge, this is the first experiment that showed the mitigation of XPM in a phase-sensitively amplified transmission link.
Also, the effectiveness in mitigating self-phase modulation (SPM) and XPM using a PSA is studied.
self-phase modulation mitigation
crossphase modulation mitigation
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
BENJAMIN FOO, MAGNUS KARLSSON, KOVENDHAN VIJAYAN, MIKAEL MAZUR, AND PETER A. ANDREKSON, 'Analysis of nonlinearity mitigation using phase-sensitive optical parametric amplifiers'.
Optical Bandwidth Dependency of Nonlinearity Mitigation in Phase-Sensitive Amplifier Links
European Conference on Optical Communication, ECOC,; Vol. 2018-September(2018)
Paper in proceedings
Kovendhan Vijayan, Benjamin Foo, Magnus Karlsson, Peter A Andrekson, 'LONG-HAUL TRANSMISSION OF WDM SIGNALS WITH IN-LINE PHASE-SENSITIVE AMPLIFIERS'.
Kovendhan Vijayan, Benjamin Foo, Magnus Karlsson, and Peter A. Andrekson, 'Cross-phase Modulation Mitigation in Phase-sensitive Amplifier Links'.
Areas of Advance
Information and Communication Technology
C3SE (Chalmers Centre for Computational Science and Engineering)
Atom and Molecular Physics and Optics
Other Physics Topics
Electrical Engineering, Electronic Engineering, Information Engineering
Technical report MC2 - Department of Microtechnology and Nanoscience, Chalmers University of Technology: 424
Chalmers University of Technology
Kollektorn, lecture room, Kemivägen 9, MC2-huset
Opponent: Dr. Bengt-Erik Olsson, Ericsson AB