Generation of all-fiber third-order orbital angular momentum modes based on femtosecond laser irradiation

Hang Wu; Liao Chen; Xuewen Shu; Xinliang Zhang

doi:10.1117/12.2672639

10 April 2023 Generation of all-fiber third-order orbital angular momentum modes based on femtosecond laser irradiation

Hang Wu, Liao Chen, Xuewen Shu, Xinliang Zhang

Proceedings Volume 12614, 14th International Photonics and Optoelectronics Meetings (POEM 2022); 126140L (2023) https://doi.org/10.1117/12.2672639
Event: 14th International Photonics and Optoelectronics Meeting (POEM 2022), 2022, Wuhan, China

Abstract

In this article, a long period fiber grating (LPFG) based on femtosecond laser irradiation is proposed to generate the third order Orbital Angular Momentum (OAM) mode. With the advantage of lower heat absorption efficiency, lower power and small focused spot size，this method is more reliable ,repeatable and promising compared with the traditional method based on carbon dioxide laser. The experiments results demonstrated that the fundamental mode can be converted to the linear polarization mode LP₃₁ mode even OAM_±3 modes with 98% mode conversion efficiency near 1550nm. The proposed method has the potential to generate higher order mode.

Citation Download Citation

Hang Wu, Liao Chen, Xuewen Shu, and Xinliang Zhang "Generation of all-fiber third-order orbital angular momentum modes based on femtosecond laser irradiation", Proc. SPIE 12614, 14th International Photonics and Optoelectronics Meetings (POEM 2022), 126140L (10 April 2023); https://doi.org/10.1117/12.2672639

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