Characterizing topological charge of optical vortices by using an annular aperture

被引：152
作者：
Guo, Cheng-Shan [1 ]
Lu, Lei-Lei [1 ]
Wang, Hui-Tian [2 ,3 ]
机构：
[1] Shandong Normal Univ, Dept Phys, Jinan 250014, Peoples R China
[2] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
[3] Nankai Univ, Key Lab Weak Light Nonlinear Photon, Tianjin 300071, Peoples R China
来源：
OPTICS LETTERS | 2009年 / 34卷 / 23期
基金：
中国国家自然科学基金;
关键词：
ORBITAL ANGULAR-MOMENTUM; GAUSSIAN LASER MODES; LIGHT; STATES;
D O I：
10.1364/OL.34.003686
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We explore the spatial frequency property of the far-field diffraction intensity pattern of an optical vortex after passing through an annular aperture in detail. The result reveals that the spatial spectrum consists of alternate bright and dark rings and, in particular, the number of the bright rings is nicely identical to the absolute value of the topological charge. Based on this property, we present and demonstrate a simple technique to characterize the topological charge of an optical vortex through its diffraction intensity pattern after an annular aperture. (C) 2009 Optical Society of America
引用
收藏
页码：3686 / 3688
页数：3
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