外差式数字光锁相环的设计及Simulink验证  

Design and Simulink Verification for Heterodyne Digital Optical Phase-Locked Loop

作　　者：刘小雨 陈鑫[1] 单永欣 张颖[1] LIU Xiaoyu;CHEN Xin;SHAN Yongxin;ZHANG Ying(College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 210016,China)

机构地区：[1]南京航空航天大学电子信息工程学院,江苏南京210016

出　　处：《电子器件》2021年第4期854-858,共5页Chinese Journal of Electron Devices

基　　金：模拟集成电路重点实验室基金项目(61428020304);国家自然科学基金项目(61106029,61701228);航空科学基金(20180852005)。

摘　　要：光锁相环是一种光频段的锁相环,常用于相干光通信和谐振式光纤陀螺领域。外差式光锁相环通过环路反馈原理锁定2个主从激光器的频率差,可用于抑制谐振式光纤陀螺中存在的背反噪声。提出了一种外差式数字光锁相环的结构,其核心控制环路为数字电路,用于实现激光器频率差的锁定功能。同时提出了一种Simulink行为级建模方法,对外差式数字光锁相环的各个模块进行建模和仿真,仿真结果验证了外差式数字光锁相环的频差锁定功能的正确性。Optical phase locked loop is one kind of phase locked loop in optical frequency band,which is widely used in the fields of coherent optical communication and resonant fiber optic gyroscope.The heterodyne optical phase-locked loop locks the frequency difference of the two master-slave lasers through the principle of loop feedback,which can be used in suppressing the back scattering noise in the resonant fiber optic gyroscope.A heterodyne digital optical phase-locked loop structure is proposed,whose core control loop is a digital circuit,which is used to realize the locking function of the two lasers’frequency difference.Then a Simulink behavioral modeling methodology is proposed to model and simulate each module of the heterodyne digital optical phase-locked loop.The simulation results verify the accuracy of the frequency difference locking function of the heterodyne digital optical phase-locked loop.

关 键 词：外差式数字光锁相环 Simulink行为级建模 

分 类 号：TN710[电子电信—电路与系统]