Open AccessJoint tracking and equalization scheme for multi-polarization effects in coherent optical communication systems
Author(s) -
Yiqiao Feng,
Linqian Li,
Jintong Lin,
Hengying Xu,
Wenbo Zhang,
Xianfeng Tang,
Lixia Xi,
Xiaoguang Zhang
Publication year - 2016
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.24.025491
Subject(s) - optics , polarization division multiplexing , polarization mode dispersion , polarization (electrochemistry) , optical communication , computer science , quadrature amplitude modulation , azimuth , multiplexing , physics , orthogonal polarization spectral imaging , free space optical communication , electronic engineering , wavelength division multiplexing , dispersion (optics) , telecommunications , bit error rate , laser , decoding methods , engineering , wavelength , chemistry
We propose a joint multi-polarization-effect tracking and equalization method based on two extended Kalman filters, which can cope with state of polarization (SOP) tracing, polarization demultiplexing, equalization for polarization dependent loss (PDL) and polarization mode dispersion (PMD) in PDM-M-QAM coherent optical communication system. The mathematical model of the proposed method is given and analyzed in detail. Through simulation, the proposed method is proved to be very effective in a 28 Gbaud/s PDM-16QAM system. With the proposed method, SOP tracing speed is up to 110 Mrad/s for azimuth angle and 1200 krad/s for phase angle, respectively, and PDL and PMD can be equalized simultaneously in the values of 10 dB and more than half of the symbol period.