基于相位计算全息的完美涡旋光产生和调控方法  

Generation and modulation of the perfect vortex beams based on phase-only computer-generated hologram

作　　者：周回 耿滔[1,2] ZHOU Hui;GENG Tao(Shanghai Key Lab of Modern Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学上海市现代光学系统重点实验室,上海200093 [2]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》2023年第4期47-53,共7页Optical Instruments

基　　金：国家自然科学基金(61975125);上海市自然科学基金(21ZR1443800)。

摘　　要：空间光调制器模拟锥透镜法是目前最为广泛使用的产生完美涡旋光的方法,但是该方法无法调控光束环宽,为了解决这个问题,提出了使用傅里叶空间相位计算全息法产生、调控完美涡旋光。通过理论分析和实验测量证明,改变编码相位可以实时调控完美涡旋光的光环半径、环宽和拓扑荷数。该方法光路简单,产生的光束质量高,且光路只需进行一次调整,操作简便。另外,该方法还具有通用性强的优点,可用于产生各类变形完美涡旋光。实验产生了不同参数的椭圆形完美涡旋光,实验测量结果与理论结果吻合得很好。因此,傅里叶空间相位计算全息法是一种简便、通用、实用性更强的完美涡旋光产生、调控方法。The method of simulating cone lens with spatial light modulator is the most widely used method to generate perfect vortex beams at present.However,the ring width of the generated beam can not be controlled in real time by this method.Here,we propose an approach to generate and control the perfect vortex beams based on computer-generated phase holography in Fourier space.Through theoretical analysis and experimental measurements,We demonstrate that the method presented in this paper enables real-time control of topological charge,radius,and thickness of the generated ring beam by using a coded phase mask.The method offers simple optical path,high beam quality,and simple operation with only one of optical path ajustment.Furthermore,the proposed method can also be used to generate and control other abnormal perfect vortex beams,such as elliptic perfect vortex beams.The experimental results are in good agreement with the theoretical results.Thus,the proposed method based on phase-only computer-generated hologram presents a versatile and simple way of generating and controlling perfect vortex beams.

关 键 词：完美涡旋光束 傅里叶变换 相位计算全息 空间光调制器 

分 类 号：O436[机械工程—光学工程]