基于高速相位调制器的超快偏振控制  

Ultrafast Polarization Control based on Fast Phase Modulator

作　　者：张力 蒲国庆 义理林[1] ZHANG Li;PU Guo-qing;YI Li-lin(State Key Laboratory of Advanced Optical Communication System and Networks,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]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

出　　处：《光通信研究》2020年第2期40-43,56,共5页Study on Optical Communications

基　　金：国家自然科学基金资助项目(61575122)。

摘　　要：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。Polarization control with fast response speed is highly desired in optical communication systems,such as in related studies of polarization scrambling and polarization stabilization. However, due to the influence of materials and structure, current polarization controller can only reach nanoseconds at the fastest, which becomes the main bottleneck of polarization-related research. In this paper, a novel optical structure based on low-speed electronic polarization controller and high-speed phase modulator is introduced to realize ultrafast polarization control. The changing trajectory of polarization state on Poincare Sphere caused by slow amplitude difference change and simultaneous fast phase difference change of two orthogonal projects is demonstrated and analyzed experimentally. This method greatly improves the response speed of polarization control and provides strong support for better performance of the polarization scrambling and polarization stabilization.

关 键 词：超快偏振控制 扰偏 偏振控制器 相位调制器 

分 类 号：TN256[电子电信—物理电子学]