环形艾里振幅调控及其对湍流传播特性的优化  

Circular Airy Amplitude Modulation and Its Optimization for Propagation Characteristics in Turbulence

作　　者：周泽宇 元秀华[1] 周峰 Zhou Zeyu;Yuan Xiuhua;Zhou Feng(School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;Key Laboratory of Hunan Province on Information Photonics and Freespace Optical Communications,School of Information Science and Engineering,Hunan Institute of Science and Technology,Yueyang 414006,Hunan,China)

机构地区：[1]华中科技大学光学与电子信息学院,湖北武汉430074 [2]湖南理工学院信息科学与工程学院信息光子学与空间光通信湖南省重点实验室,湖南岳阳414006

出　　处：《光学学报》2022年第20期182-190,共9页Acta Optica Sinica

基　　金：国家自然科学基金青年科学基金(62005088)。

摘　　要：利用环形艾里振幅调制部分相干光(PCB),解决PCB的光束扩散问题,并研究了艾里函数尺度因子、截断孔径和相干长度对光束自聚焦距离和聚焦强度的影响,以及部分相干环形艾里光束在湍流环境中的闪烁指数。研究结果表明:通过调制环形艾里振幅可以控制PCB的聚焦距离,并在保留PCB对抗湍流影响、减轻光强闪烁的同时减少光束发散,聚焦点处光强闪烁较原本PCB得到进一步降低。In this paper,partially coherent beams(PCBs)are modulated by circular Airy amplitude to solve the problem of beam expansion of PCBs.The effects of Airy function scaling factor,truncation radius,and coherence length on the selffocusing distance and focusing intensity of the beam,as well as the optical intensity scintillation index of partially coherent circular Airy beam in turbulent environment,are studied.The results show that by modulating the circular Airy amplitude,the focusing distance of PCBs can be controlled,and the beam divergence can be reduced while retaining PCB to combat turbulence and reducing intensity flicker.The light intensity flicker at the focal point is further reduced compared with the original PCB.

关 键 词：物理光学 湍流光学 激光传输 激光光束特性 环形艾里部分相干光 自聚焦 光束调控 

分 类 号：O426[理学—声学]