矢量空心光束的半屏衍射  

Vector hollow beams diffracted by a half-screen

作　　者：周继芳[1] 李建龙[2,3] 陈建国[2] 

机构地区：[1]成都医学院人文信息管理学院物理教研室,四川成都610081 [2]四川大学电子信息学院,四川成都610065 [3]贵州毕节学院物理系,贵州毕节510067

出　　处：《激光杂志》2011年第4期14-15,共2页Laser Journal

基　　金：贵州省科技厅资助项目(No.20102150)

摘　　要：利用矢量瑞利——索墨菲衍射积分公式推出了空心光束半屏衍射场中衍射场的解析表达式,并数值模拟了衍射场的光强空间分布及强度奇点的相关属性。结果表明:衍射场光强已不再是空心分布,发生了很大的改变;随着衍射传输距离的增大,衍射场光强的空间分布退化为类TEM02模场分布;随着传输距离的增大,衍射场观察区域内光强奇点出现湮灭等。An analysis expression of diffraction field produced by vector hollow beams diffracted by a half-screen based on the vector Rayleigh-Sommerfeld diffraction integral formula is presented in this paper and some properties of the diffraction intensity distribution and some singularities had been numerical simulated.These results have shown that the spatial distribution varied with the increasing propagation distance and its distribution is likely as one of the model TEM02 in the far diffraction field and can observe the annihilation of the singularity intensity.

关 键 词：矢量空心光束 半屏衍射 矢量瑞利一索墨菲衍射积分公式 奇点 解析表达式 

分 类 号：TN248.1[电子电信—物理电子学]