双折射测量系统的弹光调制器原位定标及数据处理研究  

In-situ calibration of photoelastic modulator and data processing in birefringence measurement system

作　　者：王爽 李克武[2] WANG Shuang;LI Kewu(School of Computer Science and Technology,North University of China,Taiyuan 030051,China;Engineering and Technology Research Center of Shanxi Province for Opto-electric Information and Instrument,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学计算机科学与技术学院,太原030051 [2]山西省光电信息与仪器工程技术研究中心,太原030051

出　　处：《激光杂志》2025年第3期76-83,共8页Laser Journal

基　　金：国家自然科学基金(No.62205309、62205310)。

摘　　要：针对高精度双折射测量需求,开展了双弹光调制型双折射测量研究,重点解决测量系统中弹光调制器(Photoelastic Modulator,PEM)在线原位定标及数据处理问题。运用数字锁相技术完成了调制信号的多个频率成分提取,利用各频率调制信号幅值的比值,实现PEM相位调制幅值在线原位定标,在此基础上进一步完成双折射延迟量和快轴方位角同时测量。利用搭建的实验系统对索利尔巴比涅补偿器标准样品进行了实验测试,结果表明本方案能够实现PEM实时在线原位定标,并且在200 ms时间内实现相对误差低于0.60%,标准偏差不超过0.049 nm的高精度、高灵敏、快速双折射测量。本研究为光学材料、元器件在线实时双折射检测提供了很好的解决方案。In response to the demand for precise birefringence measurements,this study investigates the utilization of double photoelastic modulation for birefringence measurements.The primary focus lies in addressing challenges related to online,in-situ calibration of the photoelastic modulator(PEM) and data processing within the measurement setup.Digital phase-locking technology is employed to facilitate the assessment of multiple modulation signal frequency components.The amplitude ratio of each frequency modulation signal is employed for online,in-situ calibration of PEM phase amplitude.Furthermore,leveraging this amplitude ratio enables the determination of birefringent retardance and fast-axis azimuthal angle measurements.An experimental setup was constructed and experimentation conducted using Solier's Barbierne compensator as a standard sample.Results demonstrate that the proposed approach enables real-time online,in-situ calibration of PEM phase amplitude,facilitating high-precision,high-sensitivity,and rapid birefringence measurements.The relative error remains below 0.60%,and standard deviation doesn't exceed 0.049 nm within a 200 ms timeframe.This method exhibits promising prospects for the real-time detection of birefringence in optical materials and components,offering significant implications for practical applications in online birefringence detection.

关 键 词：双折射测量 弹光调制 相位幅值定标 数据处理 

分 类 号：TN247[电子电信—物理电子学]