Title :
Electrical Joint Equalization for PMD-Induced Performance Degradation in Direct-Detection Polarization-Multiplexed Transmission Systems
Author :
Li, Juhao ; Zhang, Linhua ; Zhang, Dechao ; Zhang, Fan ; Chen, Zhangyuan
Author_Institution :
State Key Lab. of Adv. Opt. Commun. Syst. & Networks, Peking Univ., Beijing
Abstract :
Polarization-division-multiplexed (PDM) systems are sensitive to polarization-mode dispersion (PMD), since PMD induces not only intersymbol distortion but also interchannel crosstalk. Electrical equalization for individual channels is not sufficient for the lack of information from another channel. In this letter, electrical joint equalization including both the decision-feedback equalizer and Viterbi equalizer for PMD compensation in direct-detection PDM systems is investigated. Simulation shows that joint equalizers can effectively combat PMD-induced performance degradation and lower the requirement for dynamic polarization control.
Keywords :
channel estimation; decision feedback equalisers; multiplexing; optical communication; optical fibre polarisation; PMD compensation; Viterbi equalizer; decision-feedback equalizer; dynamic polarization control; electrical joint equalization; performance degradation; polarization-division-multiplexed systems; polarization-mode dispersion; polarization-multiplexed transmission systems; Crosstalk; Decision feedback equalizers; Degradation; Optical distortion; Optical fiber communication; Optical fiber polarization; Optical receivers; Optical signal processing; Polarization mode dispersion; Viterbi algorithm; Electronic equalization; maximum-likelihood sequence estimation; optical fiber communication; polarization- multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.926113
