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中文摘要：
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。
英文摘要：
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.
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