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

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2020,（5）
• 页码范围: 1-5
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL202018.050601

摘要

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.