空间光调制器产生拉盖尔-高斯光束方法研究

摘要

为了解决产生拉盖尔-高斯模式光束较难的问题,采用二进制振幅全息图方法,基于空间光调制器,产生了拉盖尔-高斯光束,进行了理论分析和实验验证.推导了高斯光束到拉盖尔-高斯光束傅里叶变换的传递函数,通过对拉盖尔-高斯模拟图的修正,得出了可以用于空间光调制器的二进制全息图;搭建了基于4f系统的实验平台,取得了不同阶数的拉盖尔-高斯模式输出,并在实验中对产生的拉盖尔-高斯光束进行了检测.结果表明,此套装置搭建及操作简便,且可实现动态可控的光束输出,对于产生高阶涡旋光束以及因斯-高斯模式都有重要意义.%In order to handle the difficulty in generating Laguerre-Gaussian mode,the binary amplitude hologram method based on spatial light modulator was presented to produce Laguerre-Gaussian beam.After theoretical analysis and experimental verification,the transfer function of Fourier transform from Gaussian beam to Laguerre-Gaussian beam was derived.Binary hologram which can be used in spatial light modulator was obtained after modifing Laguerre-Gaussian mode simulation.Experimental platform based on 4f system was setup and Laguerre-Gaussian modes of different orders were observed and tested.The results show that,it is easy to build and operate the device conveniently and the device can realize beam output dynamically and controllably.The study is important for the generation of high-order vortex beams and Ince-Gaussian model.