平顶光束在不同系统中的传输特性比较  

Comparison of propagation properties of flat-top beams in different systems

作　　者：姜其畅[1] 张存 苏艳丽[1] 孙悦 马紫微[1] JIANG Qichang;ZHANG Cun;SU Yanli;SUN Yue;MA Ziwei(Department of Physics and Electronic Engineering,Yuncheng University,Yuncheng 044000,China)

机构地区：[1]运城学院物理与电子工程系,山西运城044000

出　　处：《量子电子学报》2022年第3期334-342,共9页Chinese Journal of Quantum Electronics

基　　金：山西省自然科学基金,201801D121023。

摘　　要：采用数值方法,对平顶高斯光束在自由空间、单透镜系统和复杂光学系统中的传输特性进行了研究。结果表明:平顶高斯光束在自由空间中传输时,首先会产生凹陷,形成两侧峰结构,随后两侧峰会逐渐融合为单峰的类高斯结构,并在相当长的距离内保持类高斯分布传输;在单透镜系统中,由于透镜的聚焦作用,平顶高斯光束会在焦点处表现出强聚焦效应,而随着传输距离的继续加大,光束会再次恢复平顶分布;在光阑和透镜组成的复杂光学系统中,由于光阑的限制,平顶分布遭到破坏,在透镜焦点之后无法再恢复平顶分布,说明在平顶光束光路中应当尽量避免光阑元件的干扰。The propagation properties of flat-top Gaussian beams in free space,single lens system and complex optical system are investigated by numerical method.It is found that when a flattened Gaussian beam propagates in free space,it will first present a hollow structure,then two side peaks form,at last the two side peaks will gradually merge into a single-peak construction with the propagation distance,and the Gaussian-like construction of single-peak can maintain for a long distance.While propagating in a single lens system,the flattened Gaussian beam presents strong focusing effect at the focal point,and after a certain distance,the beam will return to the flat-top distribution again.However,in the complex optical system composed of aperture and lens,the flat-top distribution of beams cannot recover after the focal point because of the restriction of the aperture,which indicates that the aperture should be avoided in the path of flat-top beam.

关 键 词：波动光学 平顶光束 平顶高斯光束 透镜系统 复杂光学系统 

分 类 号：O435[机械工程—光学工程]