High-order topological charges measurement of LG vortex beams with a modified Mach-Zehnder interferometer

被引：21
|
作者：
Lv, Fangjie [1 ]
Li, Xinzhong [1 ,2 ]
Tai, Yuping [3 ]
Zhang, Liping [1 ]
Nie, Zhaogang [4 ]
Chen, Qingdong [1 ]
机构：
[1] Henan Univ Sci & Technol, Sch Phys & Engn, Luoyang 471023, Peoples R China
[2] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China
[3] Henan Univ Sci & Technol, Sch Chem Engn & Pharmaceut, Luoyang 471023, Peoples R China
[4] Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637371, Singapore
来源：
OPTIK | 2015年 / 126卷 / 23期
基金：
中国国家自然科学基金;
关键词：
LG vortex beam; Topological charge measurement; High-order topological charges; Mach-Zehnder interferometer; COMPUTER-GENERATED HOLOGRAMS; ORBITAL ANGULAR-MOMENTUM; OPTICAL VORTICES; APERTURE;
D O I：
10.1016/j.ijleo.2015.08.145
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a new method to measure the high-order topological charges (TCs) of Laguerre-Gaussian (LG) vortex beams by using a modified Mach-Zehnder interferometer. Counting the number of interference bright fringes between the LG beam and its conjugate beam determines integer and half-integer TCs through half of the bright fringe number. The proposed method can measure the order of the integer TC up to 90, which is higher than that achieved by previous methods. This technique opens up new applications for LG vortex beams. (C) 2015 Elsevier GmbH. All rights reserved.
引用
收藏
页码：4378 / 4381
页数：4
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