基于球面波干涉的涡旋光产生和检测  

Generation and detection of vortex light based on spherical wave interference

作　　者：齐良骏 李威 徐毅豪 王云睿 陈珂 林伟华[1] QI Liangjun;LI Wei;XU Yihao;WANG Yunrui;CHEN Ke;LIN Weihua(National Demonstration Center for Experimental Physics Education(Wuhan University),School of Physics and Technology,Wuhan University,Wuhan 430072,China;Hongyi Honor College,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学物理科学与技术学院、物理国家级实验教学示范中心(武汉大学),湖北武汉430072 [2]武汉大学弘毅学堂,湖北武汉430072

出　　处：《物理实验》2025年第4期42-46,共5页Physics Experimentation

基　　金：2023年湖北本科高校省级教学改革研究项目;2023年武汉大学本科教育质量建设综合改革项目;2024年武汉大学实验技术项目;2024年国家自然科学基金青年学生基础研究项目(No.124B1023)。

摘　　要：涡旋光具有轨道角动量,其不同的拓扑荷数对应不同的角向相位分布.在同轴全息条件下,以球面波为参考光比以平面波为参考光更容易获得信噪比高的涡旋光.本文采用球面波为参考光,通过在空间光调制器加载不同拓扑荷数涡旋光与球面波的干涉图形,生成不同拓扑荷数的涡旋光.利用双缝干涉观察其条纹的扭曲程度,通过测量条纹偏移量与条纹周期比值确定涡旋光的拓扑荷数.基于球面波干涉的涡旋光产生和检测实验是对数字全息系统的改进与创新,拓展了原有的实验内容.Vortex light,characterized by their orbital angular momentum,exhibits azimuthal phase distributions corresponding to distinct topological charges.Under coaxial holography conditions,using a spherical wave as the reference beam is more effective than a plane wave for reconstructing vortex light with higher signal-to-noise ratios.In this study,spherical waves were employed as the reference light,and the vortex light with different topological charges could be successfully generated by loading interference patterns between spherical waves and vortex light with different topological charged onto a spatial light modulator.Simultaneously,the distortion of interference fringes by using double-slit interference was observed,and the topological charges of the vortex light based on the ratio of the fringe displacement to the fringe period could be determined.The generation and detection of vortex light based on spherical wave interference was the improvement and innovation of the digital holographic system,expanding the experimental content of existing instruments.

关 键 词：涡旋光 球面波 空间光调制器 扭曲程度 

分 类 号：O438.1[机械工程—光学工程] O436.1[理学—光学]