Tens to Hundreds of Mrad/s Fast Polarization Tracking and Demultiplexing Using Angle-Plus-Phase Algorithm in Stokes Space

A fast polarization tracking and demultiplexing algorithm in polarization-division-multiplexing (PDM) systems is proposed and demonstrated. The scheme utilizes two optimizing parameters in Stokes Space, including the polarization angle and the phase information. In addition to its transparency to mo...

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Bibliographic Details
Published in:IEEE photonics journal 2022-10, Vol.14 (5), p.1-7
Main Authors: Pan, Yan, Yan, Lianshan, Yi, Anlin, Jiang, Lin, Pan, Wei, Luo, Bin, Lau, Alan Pak Tao
Format: Article
Language:English
Subjects:
Algorithms
Demultiplexing
Digital signal processing
fast polarization tracking
Fitting
Kalman filters
Multiplexing
optical fiber communication
Polarization
polarization division multiplexing
Pulse duration modulation
Quadrature amplitude modulation
Quadrature phase shift keying
Signal processing algorithms
Silicon
Stokes parameters
Tracking
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Summary:A fast polarization tracking and demultiplexing algorithm in polarization-division-multiplexing (PDM) systems is proposed and demonstrated. The scheme utilizes two optimizing parameters in Stokes Space, including the polarization angle and the phase information. In addition to its transparency to modulation formats, the angle-plus-phase algorithm (APA) could provide fast convergence up to >100-Mrad/s polarization tracking speed. Compared to common polarization demultiplexing algorithms such as constant modulus algorithm (CMA) and linear Kalman filter (LKF), experimental results show that the polarization tracking capability of the proposed APA algorithm is significantly improved without sacrificing the transmission performance. Specifically, compared to CMA, the tracking speed can be improved from 9-Mrad/s to 160-Mrad/s for PDM quadrature phase shift keying (PDM-QPSK) signals. Furthermore, compared to CMA and LKF, APA has the best tracking performance, and the tracking speed can be reached to 34-Mrad/s for PDM 16 quadrature amplitude modulation (PDM-16QAM) signal.
ISSN:1943-0655
1943-0647
DOI:10.1109/JPHOT.2022.3200856