title: Nonlinear compensation and crosstalk suppression for 4 × 160.8 Gb/s WDM PDM-QPSK signal with heterodyne detection.
abstract: 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.
authors.affiliation: Department of Communication Science and Engineering, Fudan University, 220 Handan Road, Shanghai 200433, China.
authors.forename: Junwen
authors.initials: J
authors.lastname: Zhang
authors.forename: Jianjun
authors.initials: J
authors.lastname: Yu
authors.forename: Nan
authors.initials: N
authors.lastname: Chi
authors.forename: Ze
authors.initials: Z
authors.lastname: Dong
authors.forename: Xinying
authors.initials: X
authors.lastname: Li
mesh_terms: D000465:Algorithms; D016477:Artifacts; D003627:Data Interpretation, Statistical; D004867:Equipment Design; D019544:Equipment Failure Analysis; D017711:Nonlinear Dynamics; D055096:Optical Devices; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*