光学精密工程2017，Vol.25Issue(4)：835-841,7.DOI:10.3788/OPE.20172504.0835
高斯涡旋光束通过像散透镜后的相位奇异特性
Phase singularities of Gaussian vortex beams through an astigmatic lens
摘要
Abstract
The research of phase singularity in light fields is significant in singular optics.Herein, the expressions of field distribution and phase singularity distribution for Gaussian vortex beams through an astigmatic lens were derived based on the generalized Huygens-Fresnel diffraction integral formula, in order to study phase singularities at geometrical focal plane.The results show that the phase singularities that appear at the geometrical focal plane when Gaussian vortex beams pass through an astigmatic lens, are dependent on the astigmatic coefficient, waist width and off-axis distance of vortex.Under certain conditions, a straight edge dislocation or an optical vortex appears at the geometrical focal plane.The optical vortex locates on the y axis when the astigmatic coefficient is zero.Otherwise with the off-axis distance of zero, there is a fixed straight edge dislocation or a stable optical vortex.The optical vortex moves with the variation of astigmatic coefficient, off-axis distance or waist width.Thoes results are proved to be references for the design of optical components and the control of vortex beam phase singularities.关键词
奇点光学/高斯涡旋光束/像散透镜/相位奇点Key words
singular optics/Gaussian vortex beams/astigmatic lens/phase singularity分类
数理科学引用本文复制引用
唐碧华,郑尚彬,张勇,罗亚梅,高曾辉..高斯涡旋光束通过像散透镜后的相位奇异特性[J].光学精密工程,2017,25(4):835-841,7.基金项目
国家自然科学基金资助项目(No.61505075, No.61275203) （No.61505075, No.61275203）
四川省教育厅自然科学基金资助项目(No.16ZA0185) （No.16ZA0185）
四川省科技厅支撑计划项目(No.2014SZ0001) （No.2014SZ0001）
