Generation of the radial higher-order orbital angular momentum mode in helically twisted elliptic fiber

被引：0
|
作者：
Huang, Chuangrong [1 ]
Zhang, Jie [1 ]
Tu, Jiajing [1 ]
Gao, Shecheng [1 ]
Liu, Weiping [1 ]
Li, Zhaohui [2 ]
机构：
[1] Jinan Univ, Coll Informat Sci & Technol, Dept Elect Engn, Guangzhou, Peoples R China
[2] Sun Yat Sen Univ, Sch Elect & Informat Technol, Guangdong Prov Key Lab Optoelect Informat Proc Chi, Guangzhou, Peoples R China
来源：
OPTICS LETTERS | 2024年 / 49卷 / 20期
基金：
中国国家自然科学基金;
关键词：
LONG-PERIOD FIBER;
D O I：
10.1364/OL.533487
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The generation mechanism and regulation method of the radial higher-order orbital angular momentum (OAM) mode based on helically twisted elliptic fiber (HTEF) are investigated. This work aims to reveal the quantitative relation between the twisted rate (alpha) and the target radial higher-order OAM mode. From theoretical simulations, it is concluded that alpha is the key to regulating the radial higher- order OAM mode. In the experiment, OAM2n modes with radial higher-order n of 2, 3, 4, and 5 are successfully generated at 1550 nm by regulating alpha of the HTEF. Finally, the transmission spectrum and purity measurements are performed for the OAM24 mode, and it can be concluded that the fabricated experimental samples have more than 90 degrees lc conversion efficiency and close to 94 degrees lc purity under the appropriate alpha and twisted length. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
引用
收藏
页码：5925 / 5928
页数：4
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