期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
Evolution of an Optical Vortex Dipole Diffracted by a Quarter Screen
摘要/Abstract
摘要：
根据菲涅尔衍射积分,导出了存在于高斯光束中的光涡旋偶极子经过1/4屏衍射后的演化公式,分析了光涡旋偶极子经过1/4屏衍射后的演化特点.研究表明,通过1/4屏衍射后,衍射场中出现多对光涡旋偶极子,随着衍射距离的增加,最终在衍射场中只产生一个涡旋.随离轴量参数的变化,光涡旋偶极子出现渐变形式的演化特性.
Abstract：
The equations of optical vortex dipole diffracted by a quarter screen which exist in Gauss beam are derived according to the Fresnel diffraction integral,and a detailed analysis of evolution characteristics about the optical vortex dipole by a quarter screen are made.The result shows that,by the quarter screen diffraction,multiple pairs of optical vortex dipoles occur in the diffraction field.Meanwhile,with the change of off-axis parameter,the evolution characteristic of the optical vortex dipoles are changed gradually.
关键词
Key words：
optical vortex
;
diffraction
;
evolution
;
characteristic