Optical vortices produced by forked holographic grating and sign of their topological charge

被引：0
|
作者：
Singh, Ravindra P. [1 ]
Roychowdhury, Sanjoy [1 ]
Jaiswal, Virendra K. [1 ]
机构：
[1] Phys Res Lab, Quantum Opt & Quantum Informat Div, Ahmadabad 380009, Gujarat, India
来源：
INDIAN JOURNAL OF PHYSICS | 2006年 / 80卷 / 05期
关键词：
optical vortex; sign of topological charge; vortex trajectory; computer generated hologram;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We produce optical vortices using a computer generated hologram (CGH) having a forked grating. We propose to use free space trajectory of the vortex produced for assigning sign to topological charge associated with the vortex. We find experimental trajectory of the vortex that is matched with theoretical trajectory for negative as well as positive charge obtained with Collins integral formalism for vortex propagation. This match is used to determine the sign of the vortex charge unambiguously.
引用
收藏
页码：491 / 494
页数：4
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