利用振幅光栅生成拉盖尔高斯光束的实验研究  

Experimental study of the generation of Laguerre-Gaussianbeam using a computer-generated amplitude grating

作　　者：李丰[1] 高春清[1] 刘义东[1] 高明伟[1] 

机构地区：[1]北京理工大学信息科学技术学院光电工程系,北京100081

出　　处：《物理学报》2008年第2期860-866,共7页Acta Physica Sinica

基　　金：教育部博士点基金(批准号:20050007027);教育部"新世纪优秀人才"资助计划资助的课题.~~

摘　　要：拉盖尔高斯(Laguerre-Gaussian,LG)光束由于其独特的相位结构和轨道角动量特性在微粒旋转操纵和信息处理等方面得到了越来越多的重视.对利用振幅型叉状衍射光栅产生LG光束进行了理论分析,采用计算全息图的方法制作了振幅型叉状衍射光栅,实验上获得了角量子数为±1的LG光束,并对光束变换过程中影响光束特性的主要因素进行了讨论.Laguerre-Gaussian （LG） beams attratts much attention in the fields of rotating micro-particle manipulation and information processing due to their special phase structures and related orbital angular momentum. In this paper the generation of LG beam by an amplitude grating was theoretically studied and the LG beams with azimuthal number of ± 1 were obtained by the amplitude grating produced by the computer-generated hologram （CGH）. Influences of main factors on the beam transformation were discussed.

关 键 词：信息光学 拉盖尔高斯光束 计算全息光栅 光束轨道角动量 

分 类 号：O436[机械工程—光学工程]