Self-focusing of partially coherent beams based on complex screen and split-step Fourier transform methods  

作　　者：杨方伦 张国文 张笑琪 张艳丽 王瑞峰 朱健强 Fanglun Yang;Guowen Zhang;Xiaoqi Zhang;Yanli Zhang;Ruifeng Wang;Jianqiang Zhu(School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China;Key Laboratory of High Power Laser and Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;National Laboratory on High Power Laser and Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China [2]Key Laboratory of High Power Laser and Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [3]National Laboratory on High Power Laser and Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [4]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Optics Letters》2023年第7期53-58,共6页中国光学快报（英文版）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Nos.XDA25020203 and 25020301);the Innovation Fund of the Key Laboratory of the Chinese Academy of Sciences(No.CXJJ-21S015)。

摘　　要：The self-focusing phenomenon of partially coherent beams(PCBs)was simulated using the complex screen method combined with the split-step Fourier method to solve the nonlinear Schrödinger equation.Considering the propagation of Gaussian Schell-model beams in a nonlinear medium as an example,the suppression effects of intensity,propagation distance,and spatial coherence on small-scale self-focusing were demonstrated.Simulations of overall and small-scale self-focusing using this method were compared with the existing literature to demonstrate the validity of the method.This method can numerically analyze the degree of self-focusing in PCBs and advance the study of their nonlinearity.

关 键 词：partially coherent beams SELF-FOCUSING NONLINEARITY complex screen method Gaussian Schell-model 

分 类 号：O43[机械工程—光学工程]