摘要
通常所研究的相位奇点光束均为相位奇点位于光束光轴上的涡旋光束,也即涡旋轴与光轴重合,但在实际生成相位奇点光束和具体应用中,往往很难保证光束的涡旋轴与光轴完全重合.基于应用实际,研究了离轴的相位奇点对光束光强的影响以及具有离轴相位奇点光束的聚焦特性和应用价值.离轴的相位奇点将以其中心所在位置为旋转对称中心对整个光场的光强分布产生相干叠加的影响,同时,离轴相位光束的研究也为非均匀光强分布的生成提供了更多的选择.
The particular properties of off-axis vortex beams which have off-axis singularities in the phase fronts of laser beams were explored.The expression of the electric distribution of off-axis vortex beams and their focusing characters were studied.The superposition of off-axis singularities can cause an asymmetric intensity distribution.Also,it offers another choice of the generation of non-uniform intensity distributions.
出处
《上海理工大学学报》
CAS
北大核心
2016年第6期527-534,共8页
Journal of University of Shanghai For Science and Technology
基金
国家973计划资助项目(2015CB352001)
关键词
相位奇点
涡旋光束
奇点光束
离轴奇点
光强分布
phase singularity
vortex beam
singularity optical beam
off-axis singularity
intensity distribution
