基于相位全息法的高阶和分数阶涡旋光产生方法及性能研究  

Research on the generation method and performance of high order and fractional order vortex light based on phase holography

作　　者：杨焓 王润兵 邢浩儒 杨启航 李盼 许飞[1] 祁义红 YANG Han;WANG Runbing;XING Haoru;YANG Qihang;LI Pan;XU Fei;QI Yihong(School of Physics,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学物理学院,上海200237

出　　处：《光通信技术》2023年第6期53-56,共4页Optical Communication Technology

基　　金：国家自然科学基金项目(11874146)资助;上海市大学生创新项目(No.S202210251104)资助;华东理工大学大学生创新创业训练计划项目(X202210251297)资助。

摘　　要：为了进一步探索高阶和分数阶涡旋光的高效产生方法,利用相关计算程序模拟了涡旋光相位全息图,搭建了相位全息法产生涡旋光的光路,研究了整数和分数阶涡旋光的光场分布特点。实验结果表明:当产生轨道角动量拓扑荷数l=1~200整数阶的涡旋光时,涡旋光束图的中心暗斑在一定范围内会随拓扑荷数的增大而增大,超过一定数值范围后,受限于仪器参数的涡旋光质量会降低;当产生l=8.1、8.4、8.8分数阶的涡旋光时,涡旋光相位出现分数分布,径向缺口随分数阶拓扑荷数增大而逐渐向整数阶演化。In order to further explore the efficient generation methods of high order and fractional order vortex light,relevant computational programs are used to simulate the phase hologram of vortex light,and the optical path for generating vortex light using phase holography is constructed.The optical field distribution characteristics of integer and fractional order vortex light are studied.The experimental results show that when generating vortex light with orbital angular momentum topological charge l=1~200 integer orders,the central dark spot of the vortex beam pattern will increase with the increase of topological charge within a certain range.After exceeding a certain numerical range,the quality of vortex light limited by instrument parameters will decrease.When generating fractional order vortex light with l=8.1,8.4 and 8.8,the phase of the vortex light exhibits a fractional distribution,and the radial gap gradually evolves towards integer order as the fractional order topological charge increases.

关 键 词：涡旋光束 轨道角动量 相位全息图 螺旋相位 空间光调制器 

分 类 号：O43[机械工程—光学工程] TN929[理学—光学]