All-fiber third-order orbital angular momentum mode generation employing an asymmetric long-period fiber grating

被引：48

作者：

He, Xiaodong ^{[1
,2
]}

Tu, Jiajing ^{[3
]}

Wu, Xiaowen ^{[3
]}

Gao, Shecheng ^{[3
]}

Shen, Lei ^{[4
]}

Hao, Chenglong ^{[5
]}

Feng, Yuanhua ^{[3
,7
]}

Liu, Weiping ^{[3
]}

Li, Zhaohui ^{[1
,2
,6
]}

机构：

[1] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China

[2] Sun Yat Sen Univ, Sch Elect & Informat Technol, Guangzhou 510275, Peoples R China

[3] Jinan Univ, Coll Informat Sci & Technol, Dept Elect Engn, Guangzhou 510632, Peoples R China

[4] Yangtze Opt Fiber & Cable Joint Stock Ltd Co, State Key Lab Opt Fiber & Cable Manufacture Techn, Wuhan 430073, Peoples R China

[5] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore

[6] Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519000, Peoples R China

[7] Chinese Acad Sci, Inst Semicond, State Key Lab Integrated Optoelect, Beijing 100083, Peoples R China

来源：

OPTICS LETTERS | 2020年 / 45卷 / 13期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1364/OL.394333

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The third-order orbital angular momentum (OAM(+/- 3)) guided mode generation is demonstrated for the first time, to the best of our knowledge, by employing an asymmetric long-period fiber grating (AS-LPFG). The proposed AS-LPFG is modeled by coupled local-mode theory, which is extended to the coupling of core modes and is fabricated by multicycle scanning ablation with increasing power in a six-mode fiber. The experiments demonstrate that one fabricated AS-LPFG can convert the LP01 mode to the third-azimuthal-order (3AO, LP31 or OAM(+/- 3)) guided mode with efficiency of similar to 99.8%. The model and the method presented, in principle, can be used to generate any other high-order modes. (C) 2020 Optical Society of America

引用

页码：3621 / 3624

页数：4

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