title: Nonlinear signal-noise interactions in dispersion managed coherent PM-QPSK systems in the presence of PMD.
abstract: 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.
authors.affiliation: State Key Laboratory of Information Photonics and Optical Communication, Beijing University of Posts and Telecommunications, Beijing, China. yixiga@126.com
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Yi
authors.forename: Jian
authors.initials: J
authors.lastname: Wu
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Xiaobin
authors.initials: X
authors.lastname: Hong
authors.forename: Hongxiang
authors.initials: H
authors.lastname: Guo
authors.forename: Yong
authors.initials: Y
authors.lastname: Zuo
authors.forename: Jintong
authors.initials: J
authors.lastname: Lin
mesh_terms: D016477:Artifacts; D004867:Equipment Design; D005336:Fiber Optic Technology / Q000295:instrumentation*; D017711:Nonlinear Dynamics; D012815:Signal Processing, Computer-Assisted; D013685:Telecommunications / Q000295:instrumentation*