Excitation of high order orbital angular momentum modes in ultra-short chiral long period fiber gratings

被引：15
作者：
Huang, Zheng [1 ,2 ]
Bai, Zhiyong [1 ,2 ]
Zhu, Guoxuan [1 ,2 ]
Huang, Churou [1 ,2 ]
Chen, Jiayan [1 ]
Liu, Shen [1 ,2 ]
Fu, Cailing [1 ,2 ]
He, Jun [1 ,2 ]
Wang, Yiping [1 ,2 ]
机构：
[1] Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ Guangdong Prov, Shenzhen 518060, Peoples R China
[2] Shenzhen Univ, Guangdong & Hong Kong Joint Res Ctr Opt Fibre Sen, Shenzhen Key Lab Photon Devices & Sensing Syst In, Shenzhen 518060, Peoples R China
来源：
OPTICS EXPRESS | 2021年 / 29卷 / 24期
基金：
中国国家自然科学基金;
关键词：
OPTICAL VORTEX GENERATION; LIGHT; BEAMS; SHIFT;
D O I：
10.1364/OE.442760
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A class of ultra-short chiral long period fiber gratings (CLPFGs) are prepared by writing a spiral curve on the surface of a six-mode fiber. The CLPFGs are applied to excite +/- 2nd- and +/- 3rd-order orbital angular momentum (OAM) modes. The coupling efficiency of the CLPFG in these modes can be as high as 99%, when the length is only 0.5cm. The polarization characteristic of the excited higher-order OAM modes in CLPFGs was theoretically analyzed and experimentally investigated. Results show that the obtained +/- 2nd- and +/- 3rd-order OAM modes are polarization independent, as expected. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：39384 / 39394
页数：11
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