基于costas光学锁相环的性能分析  

Performance Analysis Based on costas OPLL

作　　者：吕曦光[1] 孙亭玉[1] 郝博涛[1] 李晓光[1] 王磊[1] 郑文波[1] 

机构地区：[1]长春理工大学光电工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2012年第4期27-30,共4页Journal of Changchun University of Science and Technology(Natural Science Edition)

摘　　要：光学锁相环是相干光通信系统的核心组成部分,可以有效地实现本振对信号光的相位跟踪和锁定,从而大大提高系统的接收灵敏度。本文基于二进制相移键控(BPSK)调制的科斯塔斯(costas)光学锁相环原理,通过软件仿真和计算得到了二阶环路下,带宽与自然频率的最佳关系以及维持系统稳定性的最优环路带宽,并在此基础上得到了相干系统各种参数的关系。OPLL is the core component of the coherent optical communication system, it caa effectively achieve phase tracking and locking between local oscillator and the received signal light, thus improve the system sensibility greatly. In this paper, on the basis of costas OPLL principle with BPSK modulation, we achieved the best relationship between bandwidth and natural frequency with the help of software simulation and computation, but also the optimum bandwidth that maintain the stability of the system under the second-order OPLL condition, based on this, we got the relation- ships of various parameters in coherent systems .

关 键 词：相干光通信 BPSK调制 costas光学锁相环 

分 类 号：TN929[电子电信—通信与信息系统]