使用空间光调制器产生高阶厄米高斯光束  

Generation of High-Order Hermite-Gaussian Beams Using a Spatial Light Modulator

作　　者：刘奎[1] 李治 郭辉 郜江瑞[1] Liu Kui;Li Zhi;Guo Hui;Gao Jiangrui(State Key Laboratory of Quantum Optics and Quantum Optics Device,Institute of Opto-Electronics,Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan,Shanxi 030006,China)

机构地区：[1]山西大学光电研究所量子光学与光量子器件国家重点实验室极端光学协同创新中心,山西太原030006

出　　处：《中国激光》2020年第9期217-222,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(11674205,91536222);国家重点研发计划(2016YFA0301404);山西省高等学校创新人才支持计划;山西省1331工程资助课题。

摘　　要：提出通过单个空间光调制器制备厄米高斯(HG)光束的方法,理论上分析了输入光束空间横向分布与模式转换效率的关系,实验上采用最佳的椭圆形光斑入射,获得了高质量的HG6,0、HG8,0、HG10,0模光场,纯度分别为96.2%,94.9%,93.4%,并且HG10,0模的转换效率达到了14.45%,输出功率为217 mW,其转换效率较传统的基模高斯光束入射时提高了5.6倍。此高质量及高效的高阶厄米高斯光束制备方法,有望应用于高阶空间压缩态光场制备和空间小位移精密测量等方面。Herein, the generation of Hermite-Gaussian beams using a spatial light modulator was experimentally investigated and the relation between mode conversion efficiency and transverse distribution of the input beam was theoretically analyzed. High-quality Hermit-Gaussian beams with HG6,0, HG8,0, and HG10,0 modes, whose purity was 96.2%, 94.9%, and 93.4%, respectively, were experimentally generated using the optimum input beam with an elliptical transverse distribution. Moreover, the 217-mW HG10,0 mode was obtained and the mode conversion efficiency reached 14.45%, which is 5.6 times higher than that of the traditional input beam with fundamental Gaussian mode. The generation method of Hermite-Gaussian beam with high quality and efficiency has promising application potentials in the precision measurement of small displacement and preparation of a high-order spatial squeezed light field.

关 键 词：光束传输与控制 厄米高斯光场 空间光调制器 空间压缩态 

分 类 号：O436[机械工程—光学工程]