DU Qiuping,ZHANG Xia,GUO Yao,YANG Zhenshan,ZHANG Xiaoguang.Density-matrix-formalism based scheme for polarization mode dispersion monitoring and compensation in optical fiber communication systems[J].Optoelectronics Letters,2023,(12):739-743
Density-matrix-formalism based scheme for polarization mode dispersion monitoring and compensation in optical fiber communication systems
Author NameAffiliation
DU Qiuping School of Physics Science and Information Engineering, Shandong Provincial Key Laboratory of Optical Communications Science and Technology, Liaocheng University, Liaocheng 252000, China 
ZHANG Xia School of Physics Science and Information Engineering, Shandong Provincial Key Laboratory of Optical Communications Science and Technology, Liaocheng University, Liaocheng 252000, China 
GUO Yao School of Physics Science and Information Engineering, Shandong Provincial Key Laboratory of Optical Communications Science and Technology, Liaocheng University, Liaocheng 252000, China 
YANG Zhenshan School of Physics Science and Information Engineering, Shandong Provincial Key Laboratory of Optical Communications Science and Technology, Liaocheng University, Liaocheng 252000, China 
ZHANG Xiaoguang State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China 
Abstract:
      We propose a density-matrix-formalism based scheme to study polarization mode dispersion (PMD) monitoring and compensation in optical fiber communication systems. Compared to traditional monitoring and compensation schemes based on the PMD vector in the Stokes space, the scheme we proposed requires no auxiliary matrices and can be handily extended to any higher-dimensional modal space, which is advantageous in mode-division multiplexing (MDM) systems. A 28 GBaud polarization division multiplexing quadrature phase-shift keying (PDM-QPSK) coherent simulation system is built to demonstrate that our scheme can implement the monitoring and compensation of 170 ps large differential-group-delay (DGD) that far exceeds the typical DGDs in practical optical communication systems. The results verify the effectiveness of the density-matrix-formalism based scheme in PMD monitoring and compensation, thus pave the way for further applications of the scheme in more general MDM optical communication systems.
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