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  • Received: Nov. 15, 2019

    Accepted: Jan. 10, 2020

    Posted: Apr. 29, 2020

    Published Online: May. 6, 2020

    The Author Email: Zhengyong Li (zhyli@bjtu.edu.cn)

    DOI: 10.3788/COL202018.050601

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    Bochen Wang, Zhengyong Li. Uniformly high-speed semi-open loop polarization control and PMD suppression[J]. Chinese Optics Letters, 2020, 18(5): 050601

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Chinese Optics Letters, Vol. 18, Issue 5, 050601 (2020)

Uniformly high-speed semi-open loop polarization control and PMD suppression 

Bochen Wang and Zhengyong Li*

Author Affiliations

  • Key Laboratory of Luminescence and Optical Information Technology, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China

Abstract

We propose and demonstrate a novel scheme of semi-open-loop polarization control (SOL-PC), which controls the state of polarization (SOP) with high accuracy and uniform high speed. For any desired SOP, we first adjust the initial SOP using open-loop control (OLC) based on the matrix model of a three-unit piezoelectric polarization controller, and quickly move it close to the objective one. Then closed-loop control (CLC) is performed to reduce the error and reach precisely the desired SOP. The response time is three orders faster than that of the present closed-loop polarization control, while the average deviation is on par with it. Finally, the SOL-PC system is successfully applied to realize the suppression of the polarization mode dispersion (PMD) effect and reduce the first-order PMD to near zero. Due to its perfect performance, the SOL-PC energizes the present polarization control to pursue an ideal product that can meet the future requirements in ultrafast optical transmission and quantum communication.

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