通过拼接不同曝光的四波横向剪切干涉图来确定激光束质量因子（M）。

Determination of the laser beam quality factor (M) by stitching quadriwave lateral shearing interferograms with different exposures.

作者信息

Han Zhi-Gang, Meng Ling-Qiang, Huang Zhe-Qiang, Shen Hua, Chen Lei, Zhu Ri-Hong

出版信息

Appl Opt. 2017 Sep 20;56(27):7596-7603. doi: 10.1364/AO.56.007596.

DOI:10.1364/AO.56.007596

Abstract

A complete complex amplitude reconstruction method for the determination of the laser beam quality factor M based on the multiple exposure of a quadriwave lateral shearing interferometer (QWLSI) is presented. The theoretical analysis and simulation of the influence of the information in the small signal area on the calculation of the M factor is provided. The experimental results demonstrate that the new method can be an accurate means to measure the M factor. The proposed method can avoid the influence of phase inaccuracy in the small signal area of the interferogram, during the measurement of the M factor.

摘要

提出了一种基于四波横向剪切干涉仪（QWLSI）多次曝光来确定激光束质量因子M的完整复振幅重建方法。提供了小信号区域信息对M因子计算影响的理论分析和仿真。实验结果表明，该新方法可以成为测量M因子的一种准确手段。所提出的方法在测量M因子时可以避免干涉图小信号区域相位不准确的影响。