Effect of spatial coherence on determining the topological charge of a vortex beam

被引：46

作者：

Zhao, Chengliang ^{[1
]}

Wang, Fei ^{[1
]}

Dong, Yuan ^{[1
]}

Han, Yujing ^{[2
]}

Cai, Yangjian ^{[1
]}

机构：

[1] Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China

[2] Heze Univ, Dept Phys, Heze 274015, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 26期

基金：

中国国家自然科学基金;

关键词：

LAGUERRE-GAUSSIAN BEAMS; FRACTIONAL FOURIER-TRANSFORM; ORBITAL ANGULAR-MOMENTUM; LASER MODES; LIGHT; VORTICES; ORDER;

D O I：

10.1063/1.4773236

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

It is known that one can determine the topological charge of a vortex beam based on the Fourier transform of its intensity. We demonstrate both theoretically and experimentally that this method will be invalid for determining the topological charge of a vortex beam with low coherence. Furthermore, we propose a method to determine the topological charge of a vortex beam with low coherence based on its complex degree of coherence. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4773236]

引用

页数：5

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