中国激光, 2015, 42 (7): 0708008, 网络出版: 2022-09-24
基于马赫-曾德尔点衍射干涉仪的激光模式复振幅测量
Measure the Complex Amplitude of Laser Mode by Mach-Zehnder Point Diffraction Interferometer
测量 激光模式 马赫-曾德尔点衍射干涉仪 复振幅 measurement laser mode Mach-Zehnder point diffraction interferometer complex amplitude
摘要
利用马赫-曾德尔点衍射干涉仪,通过一幅干涉图,直接恢复激光模式的强度和相位信息,重建模式复振幅。在理论上分析了利用快速傅里叶变换的点衍射干涉法重建激光复振幅分布的原理;推导了激光模式在自由空间中传输时强度和相位的分布情况。将模拟的分布与实验结果做了比较,结果表明,点衍射干涉法可以恢复激光模式的强度和相位信息。
Abstract
Mach-Zehnder point diffraction interferometer is used to reconstruct the complex amplitude by obtaining the information of phase and intensity of laser mode from a interferogram. A method to reconstruct the complex amplitude by using point-diffraction interferometry based on fast Fourier transform is analyzed theoretically. The phase and intensity distributions are deduced when laser mode propagates in the free space. The simulation of phase and intensity distributions with the experimental results are compared. The results show that complex amplitude can be restored by point-diffraction interferometry.
董哲良, 冯国英, 胡丽荔, 张澍霖. 基于马赫-曾德尔点衍射干涉仪的激光模式复振幅测量[J]. 中国激光, 2015, 42(7): 0708008. Dong Zheliang, Feng Guoying, Hu Lili, Zhang Shulin. Measure the Complex Amplitude of Laser Mode by Mach-Zehnder Point Diffraction Interferometer[J]. Chinese Journal of Lasers, 2015, 42(7): 0708008.