Multi-order orbital angular momentum mode generators based on integrated long-period fiber gratings

被引：1
|
作者：
Ma, Yuehui [1 ,2 ]
Jiang, Chen [3 ,4 ]
Chen, Siyu [1 ]
Mou, Chengbo [1 ]
Zhou, Kaiming [2 ]
Liu, Yunqi [1 ]
机构：
[1] Shanghai Univ, Shanghai Inst Adv Commun & Data Sci, Joint Int Res Lab Specialty Fiber Opt & Adv Commu, Key Lab Specialty Fiber Opt & Optic Access Networ, Shanghai 200444, Peoples R China
[2] Aston Univ, Aston Inst Photon Technol, Birmingham B4 7ET, W Midlands, England
[3] Nanjing Univ Posts & Telecommun, Adv Photon Technol Lab, Coll Elect & Opt Engn, 9 Wenyuan Rd, Nanjing 210023, Peoples R China
[4] Nanjing Univ Posts & Telecommun, Coll Flexible Elect Future Technol, 9 Wenyuan Rd, Nanjing 210023, Peoples R China
来源：
OPTICS LETTERS | 2024年 / 49卷 / 11期
基金：
中国国家自然科学基金;
关键词：
OPTICAL-FIBERS; LIGHT;
D O I：
10.1364/OL.520507
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose integrated long-period fiber gratings (LPFGs) fabricated by a CO2 laser to realize a multi-channel and multi-order orbital angular momentum (OAM) mode generator. The integrated LPFG is inscribed on multiple surfaces of the few-mode fiber (FMF) by rotating the fiber in the opposite direction at an angle theta. By controlling the rotation angle, the number of integrated LPFGs can be set. The selected rotation angle is 43 degrees, which can integrate up to nine LPFGs, i.e., realizing that the number of channels for first-order orbital angular momentum (OAM) mode conversion is nine. The integrated LPFGs fabricated in this method allow a flexible design of channel spacing. In addition, the flexible selection of the integrated grating period achieves the simultaneous generation of multi-channel second-order and third-order OAM mode conversion. The multi-channel and multi-order OAM mode generators have important application in optical communication multiplexing systems and OAM sensing. (c) 2024 Optica Publishing Group
引用
收藏
页码：3243 / 3246
页数：4
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