外差式光学锁相环路相位噪声分析  

Phase Noise Analysis of Heterodyne Optical Phase-Locked Loop

作　　者：刘素珍[1] 李纯标 

机构地区：[1]中国人民解放军92941部队95分队,辽宁葫芦岛125001

出　　处：《光学与光电技术》2017年第4期78-82,共5页Optics & Optoelectronic Technology

摘　　要：在激光通信、量子光学等领域,获得低相位噪声的相干激光是实现高信噪比信号探测的前提,光学锁相环是获得相干光的有效方式,环路的相位噪声水平直接制约着相干光相位噪声水平。为了降低相干激光相位噪声,从光学锁相环环路的基本模型出发,推导了锁相环的传递函数以及环路方程,分析了锁相环路不同频段的相位噪声来源和其对环路噪声的影响,最后通过激光锁相实验对前面的理论分析进行了简单的验证和分析。对低相噪锁相环路设计具有指导意义。In the field of laser communication and quantum optics, the coherent laser with low phase noise is the prerequisite for high signal-to-noise ratio detection. The optical phase-locked loop is an effective way to obtain phase coherent laser. The phase noise level of the loop directly restricts the phase noise of the coherent laser. In order to reduce phase noise of the co- herent laser, the transfer function and the loop equation of the phase-locked loop are deduced from the model of the optical phase-locked loop. The phase noise of the phase-locked loop and its effects on the loop noise are analyzed. The theoretical a- nalysis is simply verified by optical phase-locked loop experiment. The test results have guiding significance for low phase noise phase-locked loop design.

关 键 词：精密测量 相位相干光 光学锁相环 传递函数 相位噪声分析 

分 类 号：TN911.8[电子电信—通信与信息系统]