高斯光束对零差测振系统光电信号的影响  

Influence of Gaussian Beam on Photo-electric Signal of Homodyne Vibrometer System

作　　者：王豹亭[1] 吴健[1] 杨春平[1] 康美苓[1] 

机构地区：[1]电子科技大学光电信息学院,成都610054

出　　处：《光电工程》2010年第8期53-56,共4页Opto-Electronic Engineering

基　　金：国家863计划高科技项目

摘　　要：结合高斯光束电场分布和平面波分析方法,推导了高斯光束照射下零差测振系统光电信号的解析表达式,分析了由高斯光束引起的相对测量误差。分别讨论了探测器与光传输轴线的距离、探测器与光腰的距离、振动位移、光腰半径与测量误差的关系。并对特定参数的零差测振系统进行了数值仿真,仿真结果与理论分析吻合。结果表明:振动位移和光腰半径与测量误差的关系比较复杂,测量误差随振动位移增加而增大的同时呈周期性波动;光腰半径与测量误差的关系曲线出现一零值点和一极大值点。为高精度激光测量误差分析提供了理论依据。Combining electric field distribution of Gaussian beam and plane-wave analysis method,the photo-electric signal analytical expression of homodyne vibrometer system irradiated by Gaussian beam was deduced.And relative measurement error caused by Gaussian beam was analyzed.The relationships between relative measurement error and the distance from detector to laser beam transmission axis,the distance from detector to beam-waist,vibration displacement and beam-waist radius were discussed,respectively.The homodyne vibrometer system of specific parameters was simulated numerically and the simulation results coincided with the theoretical analysis.The results show that the relationship between measurement error and vibration displacement and beam-waist radius is complex.Measurement error increases with the increase of vibration displacement while fluctuating cyclically.There＇s a zero point and maxima in the relationship curve of beam-waist radius and measurement error.It provides a theoretical basis for error analysis in high-precision laser measurement.

关 键 词：高斯光束 零差测振系统 光电信号 测量误差 

分 类 号：TN249[电子电信—物理电子学]