激光技术Issue(5)：723-726,4.DOI:10.7510/jgjs.issn.1001-3806.2015.05.029
拉盖尔－高斯涡旋光束传播中的相位变化分析
Analysis of phase change of Laguerre-Gaussian vortex beam during propagation
摘要
Abstract
In order to study the phase characteristics of Laguerre-Gaussian vortex beam during propagation , the vortex beam was obtained by means of spiral phase plates .Based on Fresnel diffraction integral formula , the phase change of the beam in the propagation process and the stability of vortex beam phase singularities at integer order and fractional order were studied by theoretical derivation and numerical simulation .When the beam was transmitted a certain distance , phase contours of the light field on the observation plane became from diverging rays into petal-shaped arcs .The results show that if topological charge of the vortex beam is integer order , the phase singularity of the beam assumes stability in the propagation process .The phase singularity of fractional order is unstable , intensity distribution on the observation plane is obvious asymmetric and the central darkness gradually disappears .The research results supply theoretical foundation and practical guidance for the application of optical micro manipulation and information coding techniques .关键词
物理光学/涡旋光束/相位分布/拓扑荷Key words
physical optics/vortex beam/phase distribution/topological charge分类
数理科学引用本文复制引用
魏勇,朱艳英..拉盖尔－高斯涡旋光束传播中的相位变化分析[J].激光技术,2015,(5):723-726,4.基金项目
国家自然科学基金资助项目 （）
