Open AccessReal-time fast polarization tracking based on polarization phase locking least mean square algorithm
Author(s) -
Jie Li,
Tao Zeng,
Xiang Li,
Lingheng Meng,
Ming Luo,
Zhixue He,
Shaohua Yu
Publication year - 2019
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.27.022116
Subject(s) - computer science , polarization mode dispersion , polarization division multiplexing , optics , algorithm , digital signal processing , polarization (electrochemistry) , phase shift keying , offset (computer science) , least mean squares filter , frequency offset , signal processing , electronic engineering , bit error rate , physics , adaptive filter , telecommunications , orthogonal frequency division multiplexing , optical fiber , computer hardware , engineering , chemistry , decoding methods , programming language , channel (broadcasting)
We propose a fast polarization tracking scheme based on polarization phase locking least mean square (LMS) algorithm and experimentally demonstrate it in real-time implementation with a quasi-feed-forward digital signal processing (DSP) architecture. It has the advantages of no frequency/phase offset feedback requirement from the carrier recovery stage. The tracking performance of the proposed algorithm is verified in both simulation and real-time coherent transmission systems. It can track the state of polarization (SOP) variations up to 12 Mrad/s and 3.3 Mrad/s in 100-Gb/s QPSK and 400-Gb/s 16QAM simulation system, and can track 2.5 Mrad/s in 10-Gb/s QPSK real-time experiment, which has great improvement over conventional LMS algorithm.