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18 March 2024 Watt-level 2.94μm Er: ZBLAN fiber laser with low threshold
Zexin Luo, Chun Zhang, Dianjia Li, Fanlong Dong, Jiachen Wang, Qitao Lue, Chunyu Guo, Shuangchen Ruan
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Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 1310423 (2024) https://doi.org/10.1117/12.3022780
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China
Abstract
We have successfully demonstrated a high-power erbium-doped fluoride glass fiber laser operating at 2.94 μm. The system achieved continuous operation with an output power of 7.1 W at 2.94 μm. The all-fiber Fabry–Perot laser cavity was constructed using an 11.5 m, 7 mol. % Er3+ :ZBLAN fiber with two fiber Bragg gratings (FBG) having reflectivities of 99.7% and 29.2%. These fiber Bragg gratings were inscribed using a 513 nm femtosecond (fs) laser direct-writing technique. To prevent deterioration at high output powers, an endcap was fused at the output fiber end. The system operated at 2.94 μm exhibited an overall slope efficiency of 20.5% in relation to the launched pump power at 980 nm, and demonstrated a single-mode output beam quality with M2 < 1.2.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Zexin Luo, Chun Zhang, Dianjia Li, Fanlong Dong, Jiachen Wang, Qitao Lue, Chunyu Guo, and Shuangchen Ruan "Watt-level 2.94μm Er: ZBLAN fiber laser with low threshold", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 1310423 (18 March 2024); https://doi.org/10.1117/12.3022780
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KEYWORDS
Fiber lasers
Fluoride
Erbium
Fiber Bragg gratings
ZBLAN
Continuous wave operation
Laser damage threshold
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