物理学报2012，Vol.61Issue(2)：307-315,9.
线偏振拉盖尔·高斯光束的远场发散特性
Far-field divergent properties of linearly polarized Laguerre-Gauss beams
摘要
Abstract
Based on the method of stationary phase and the theorem of the vectorial structure,the analytical expressions for the vectrorial terms,namely the TE and TM terms,of a linearly polarized Laguerre-Gauss beam are derived in the far-field.According to the far-field energy flux distributions of the TE and TM terms,the ratios of the powers of the TE and TM terms to the power of the Laguerre-Gauss beam are given.The analytical formulae of the far-field divergence angles of the Laguerre-Gauss beam and its TE and TM terms are presented,respectively.A relation among the far-field divergence angles of the TE term,the TM term,and the Laguerre-Gauss beam is also derived.The formulae obtained are applicable not only to the paraxial case,but also to the non-paraxial case.The dependences of the ratios of the powers of the TE and TM terms to the whole power on f-parameter and mode number are numerically examined.The effects of the f-parameter,the mode number,and the linearly polarized angle on the far-field divergence angle of the Laguerre-Gauss beam and its TE and TM terms are also analyzed.This research reveals the far-field divergent properties of the linearly polarized Laguerre-Gauss beam from the vectorial structure,and enriches the recognition of the propagation characteristics of the linearly polarized Laguerre-Gauss beam.关键词
拉盖尔-高斯光束/远场发散角/矢量结构Key words
Laguerre-Gauss beam/far-field divergence angle/vectorial structure分类
信息技术与安全科学引用本文复制引用
周国泉..线偏振拉盖尔·高斯光束的远场发散特性[J].物理学报,2012,61(2):307-315,9.基金项目
国家自然科学基金（批准号：61178016）资助的课题~~ （）
