Open AccessNonlinear signal-noise interactions in dispersion managed coherent PM-QPSK systems in the presence of PMD
Author(s) -
Xiaogang Yi,
Jian Wu,
Yan Li,
Wei Li,
Xiaobin Hong,
Hongxiang Guo,
Yong Zuo,
Jintong Lin
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.027596
Subject(s) - phase shift keying , polarization mode dispersion , physics , optics , phase noise , polarization division multiplexing , keying , bit error rate , amplified spontaneous emission , transmission (telecommunications) , quadrature amplitude modulation , multiplexing , nonlinear system , dispersion (optics) , wavelength division multiplexing , telecommunications , channel (broadcasting) , computer science , wavelength , laser , quantum mechanics
Considering the polarization mode dispersion(PMD), the transmission penalty induced by nonlinear signal-noise interactions (NSNI) between the amplified spontaneous emission noise (ASE) and the information signal is investigated numerically for 40(100)G dispersion-managed(DM) polarization-multiplexed quadrature phase-shift keying (PM-QPSK) systems. We show that for single-channel PM-QPSK systems, PMD is helpful to reduce the NSNI-induced penalty. For multi-channel PM-QPSK system, however, the NSNI-induced nonlinear penalty is significantly enhanced by PMD, especially at low bit-rate. Our results show that due to the NSNI, the reduction of allowed input power that gives 1-dB Q penalty after 1600-km nonlinear transmission will increase from 1dB without PMD to 3.7dB with PMD for 42.8-Gbit/s coherent return-to-zero (RZ)-PM-QPSK systems.