上海交通大学 区域光纤通信网与新型光通信系统国家重点实验室, 上海 200240
在现代光通信系统中, 快响应速度的偏振控制在如扰偏和稳偏等技术的相关研究中有着极大的需求。然而, 目前的偏振控制器由于材料和结构等因素的影响, 响应速度最快只能在ns级别, 这成为偏振相关研究的主要瓶颈。文章介绍了一种基于商用低速电控偏振控制器和高速相位调制器的新型光学结构来实现超快的偏振控制。实验验证并分析了两个正交光场分量在振幅差缓慢变化和相位差快速变化同时进行的情况下, 庞加莱球上的偏振态变化轨迹。实验结果表明, 此方法大大提高了偏振控制的响应速度, 为更好性能的扰偏和稳偏技术提供了有力的支持。
超快偏振控制 扰偏 偏振控制器 相位调制器 ultrafast polarization control polarization scrambling polarization controller phase modulator
Author Affiliations
Abstract
Key Laboratory on Luminescence and Optical Information Technology, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
We report a new method to deeply analyze the scrambling characteristic of polarization scramblers based on density of polarization states (DPS) statistics that makes it possible to describe the DPS distribution in detail on the whole Poincaré sphere, thus easy to locate accurately the nonuniform areas of defective polarization scramblers, which cannot be realized by existing methods. We have built a polarization scrambling system to demonstrate the advantages of our method compared with others by experiments and suggested effective evaluation indexes whose validity is well confirmed by applying to a commercial scrambler. Our conclusions are valuable for accurately analyzing and diagnosing the performance of any polarization scrambler, and quality evaluation of polarization controllers or other polarization devices.
optical communication polarization scrambling density of polarization states Chinese Optics Letters
2020, 18(6): 060604
