一种基于切趾波带片产生局域空心光束的新方法  

A new method to generate bottle beam based on phase-shifting apodizer

作　　者：朱厚飞 姜利平[1] 刘玲玲[1] 王海凤[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学仪器》2016年第2期149-153,166,共6页Optical Instruments

基　　金：973基金资助项目(2015CB352001)

摘　　要：根据相移切趾器原理设计了七环π相移切趾波带片,准直光束经波带片与透镜聚焦后产生局域空心光束。理论上根据标量衍射理论研究局域空心光束的光场分布,并对其光强分布进行仿真,证明光束的三维"密闭性"。实验中基于空间光调制器与透镜相位得到暗斑最大半径为50.4μm的局域空心光束,且光强为零,其实验结果与理论分析基本吻合。In this paper,we propose a new method to generate bottle beam using phase-shifting apodizer.This apodizer is a seven-beltπphase-shifting zone plate.A bottle beam is obtained after a collimated light beam passes through the apodizer and then converged by an objective lens.The intensity distribution of optical field of the bottle beam is calculated based on scalar diffraction theory and the beam′s three dimensional leak is confirmed.An experiment is conducted to generate a bottle beam using spatial light modulator(SLM)and lens phase.The maximum radius of the dark spot within the bottle beam is 50.4μm,where the intensity is zero.The experimental results agree very well with the theoretical predictions.

关 键 词：相移切趾器 局域空心光束 空间光调制器 透镜位相 

分 类 号：O436[机械工程—光学工程]