Characteristics of fork-shaped fringes formed by off-axis interference of two vortex beams

被引：27
|
作者：
Ma, Jingbo [1 ]
Li, Peng [1 ,2 ]
Zhou, Ziheng [1 ]
Gu, Yuzong [1 ,2 ]
机构：
[1] Henan Univ, Sch Phys & Elect, Res Ctr Phys 2D Optoelect Mat & Devices, Kaifeng 475004, Peoples R China
[2] Int Joint Res Lab New Energy Mat & Devices Henan, Kaifeng 475004, Peoples R China
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2021年 / 38卷 / 01期
基金：
中国国家自然科学基金;
关键词：
ORBITAL ANGULAR-MOMENTUM; DETERMINING TOPOLOGICAL CHARGE; OPTICAL VORTEX; PHASE; LIGHT; VORTICES; INTERFEROMETER; DISLOCATIONS; INTENSITY; SINGLE;
D O I：
10.1364/JOSAA.412404
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Fork-shaped fringes are formed for off-axis interference between two oblique-incident vortex beams. New formulas considering various parameters [such as the angles between two vortex beams and their topological charges (TCs)] are established to describe all kinds of fork-shaped fringes. An improved Mach-Zehnder interferometer is employed to investigate these interference fringes. Experimental measurements are consistent with numerical simulations by using our formulas. Our results broaden the understanding of the off-axis interference between two vortex beams, and can be applied to detect the TCs' sign and value of an unknown vortex beam, especially large-value TCs. (C) 2020 Optical Society of America.
引用
收藏
页码：115 / 123
页数：9
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