相干光通信系统中的自动相位补偿方法实验（英文）  

Experiment on auto-compensation method of phase drift in optical coherent-detection system

作　　者：徐盛晨 喻松[1] 柯超凡[1] 顾畹仪[1] 

机构地区：[1]北京邮电大学,北京100876

出　　处：《红外与激光工程》2013年第S02期481-484,共4页Infrared and Laser Engineering

基　　金：国家973计划(2012CB315605,2014CB340102);国家自然科学基金(61271191,61271193,61072054);信息光子学与光通信国家重点实验室基金;中央高校基础研究基金

摘　　要：相位漂移一直是相干光通信系统实施过程中需克服的关键问题之一。在弄清了该问题的根本原因后,给出了一个自动补偿算法,用于减轻相位漂移对光链路中传输的光脉冲所产生的不利影响。基于理论研究和实验分析,用先进的硬件技术实现了自动补偿模块,并将其集成到早起搭建的相干光通信系统中。相比于之前相位随机抖动的情况,目前相位可被完全补偿。实验结果显示,当采用了笔者提出的为原始数据周期性地添加同步和训练序列的方法后,才可计算反馈信号,该反馈信号输入到相位调制器的控制输入端来稳定光脉冲的相位,并使得接收端的数据采集和恢复成为可能。Phase drift has always been a serious problem in the implementation process of optical coherent-detection systems . Recognizing the root causes of this problem , an auto-compensation algorithm was proposed , aiming at reducing the negativeimpact of phase drift on light pulses transmitting through optic links . Based on theoretical analysis and practical research , the auto-compensation moduleusing advanced hardware was realized , and integrate it into the optical coherent-detection system we built earlier for experiment use . Compared with the previous scenario in with the phase changed randomly , it can now be compensated completely . The experimental result shows that after adopting the proposed method that inserts synchronization and training sequences into the raw data periodically , the authors are now able to calculate the feedback signal , which is applied to the control input of phase modulator , to stabilize the phase of light pulses , thus enabling data acquisition and recovery on the receiver side .

关 键 词：相干 相位 补偿 FPGA 检测 

分 类 号：O439[机械工程—光学工程]