Open AccessNonlinear compensation and crosstalk suppression for 4 × 1608Gb/s WDM PDM-QPSK signal with heterodyne detection
Author(s) -
Junwen Zhang,
Jianjun Yu,
Nan Chi,
Ze Dong,
Xinying Li
Publication year - 2013
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.21.009230
Subject(s) - wavelength division multiplexing , phase shift keying , polarization division multiplexing , heterodyne detection , optics , channel spacing , multiplexing , physics , local oscillator , quadrature amplitude modulation , keying , bit error rate , wavelength , computer science , channel (broadcasting) , telecommunications , phase noise , laser
We experimentally investigate digital intra-channel nonlinear impairment compensation and inter-channel crosstalk suppression for 4 × 160.8-Gb/s wavelength division multiplexing (WDM) polarization division multiplexing quadrature phase shift keying (PDM-QPSK) transmission over 1300-km single-mode fiber-28 (SMF-28) on a 50-GHz grid with the spectral efficiency of 3.21b/s/Hz, adopting simplified heterodyne coherent detection. By using nonlinear compensation based on DBP with crosstalk suppression based on post filter and maximum likelihood sequence estimation (PF&MLSE), the BER has been improved from 1.0 × 10(-3) to 3.5 × 10(-4) for 4 × 160.8Gb/s WDM PDM-QPSK with heterodyne detection after 1300km SMF-28 transmission.