Generation of the radial higher-order orbital angular momentum mode in helically twisted elliptic fiber
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 (α) and the target radial higher-order OAM mode. From theoretical simulations, it is concluded that α is the key to regulating the radial higher-order OAM mode. In the experiment, OAM<sub>2n</sub> modes with radial higher-order n of 2, 3, 4, and 5 are successfully generated at 1550 nm by regulating α of the HTEF. Finally, the transmission spectrum and purity measurements are performed for the OAM<sub>24</sub> mode, and it can be concluded that the fabricated experimental samples have more than 90% conversion efficiency and close to 94% purity under the appropriate α and twisted length.
Authors
- Chuangrong Huang (ORCID: https://orcid.org/0009-0009-4749-7441)
- Shecheng Gao (ORCID: https://orcid.org/0000-0001-7377-9180)
- Jiajing Tu
- Weiping Liu (ORCID: https://orcid.org/0000-0002-1173-892X)
- Zhaohui Li (ORCID: https://orcid.org/0000-0002-6151-8642)
- Jie Zhang (ORCID: https://orcid.org/0000-0002-3354-0690)
Institutions
- Shandong University (CN)
- Sun Yat-sen University (CN)
Publication Details
- Journal
- Optics Letters
- Published
- 2024-09-19
- DOI
- https://doi.org/10.1364/ol.533487
- Citations
- 2
- Primary Topic
- Orbital Angular Momentum in Optics
- Type
- article
- Field-Weighted Citation Impact
- 0.68
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China
- Basic and Applied Basic Research Foundation of Guangdong Province