基于高斯光束传播性质的激光相位恢复  

Laser Phase Recovery Based on Propagation Properties of Gaussian Beam

作　　者：彭金平 冯国英[1] 兰斌[1] Peng Jinping; Feng Guoying; Lan Bin(School of Electronics and Information Engineering, Sichuan University, Chengdu, Sichuan 610064, China)

机构地区：[1]四川大学电子信息学院,四川成都610064

出　　处：《中国激光》2018年第10期182-187,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(U1730141)

摘　　要：为解决傅里叶变换法处理干涉图的去载频误差问题,并准确地恢复激光待测相位,提出了一种基于高斯光束传播性质的相位恢复方法。激光器输出的高斯光束沿其传播方向的横截面上,其相位为一对称的凸面或凹面,凸面或凹面的曲率与传播距离有关。根据这一性质求出载频大小,并最终恢复待测相位。理论上该方法可以精确计算得到载频的大小,并高精度地恢复待测相位。数值仿真与实验结果都证明该方法可以准确地恢复待测相位。In order to reduce the carrier frequency error of the processed interferogram by using the Fourier transform method, and accurately recover the laser phase to be measured, we propose a phase retrieval method based on the propagation property of Gaussian beam. On the cross section of the Gaussian beam along its direction of propagation, the phase of the beam is a symmetrical convex or concave surface. The curvature of the convex or concave surface is related to the propagation distance. According to this property, the size of the carrier frequency is calculated and the phase to be measured is finally restored. In theory, the size of the carrier frequency can be calculated accurately, and the phase to be measured can be restored with high precision. Both numerical simulation and experimental results show that the proposed method can accurately recover the phase to be measured.

关 键 词：测量 干涉 相位恢复 高斯光束 傅里叶分析 

分 类 号：O436.1[机械工程—光学工程]