Femtosecond laser inscription of FBGs in ytterbium-doped fiber based on fluorescence detection techniques

Xinyu Ye; Hao Li; Meng Wang; Chenhui Gao; Baiyi Wu; Rong Zhao; Zefeng Wang

doi:10.1117/12.3032476

14 August 2024 Femtosecond laser inscription of FBGs in ytterbium-doped fiber based on fluorescence detection techniques

Xinyu Ye, Hao Li, Meng Wang, Chenhui Gao, Baiyi Wu, Rong Zhao, Zefeng Wang

Author Affiliations +

Proceedings Volume 13248, Fourth Optics Frontier Conference (OFS 2024); 1324805 (2024) https://doi.org/10.1117/12.3032476
Event: Fourth Optics Frontier Conference (OFS 2024), 2024, Hangzhou, China

Abstract

Directly inscribing fiber Bragg gratings (FBGs) in ytterbium-doped fiber (YDF) using fs-laser can reduce the melting point in fiber lasers, which is significant for developing efficient fiber laser systems. In this paper, the photoluminescence at 1 µm band excited by the fs-laser in YDF was first reported to assist the FBG inscription, to the best of our knowledge. Moreover, we demonstrate that when the fs-laser scans across the fiber, the unique inner-cladding structure of YDF has a non-negligible effect on the focus position and intensity, thereby presenting a challenge to achieve high reproducibility when inscribing FBGs. The refractive index modulation characteristics of fs-laser incident from different angles are also analyzed.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xinyu Ye, Hao Li, Meng Wang, Chenhui Gao, Baiyi Wu, Rong Zhao, and Zefeng Wang "Femtosecond laser inscription of FBGs in ytterbium-doped fiber based on fluorescence detection techniques", Proc. SPIE 13248, Fourth Optics Frontier Conference (OFS 2024), 1324805 (14 August 2024); https://doi.org/10.1117/12.3032476

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