High-efficiency, low-threshold mid-infrared Er-doped fiber lasers based on optimized pump wavelength in 1.6-1.7 μm

Junxiang Zhang; Shijie Fu; Quan Sheng; Wenxin Xia; Lu Zhang; Wer Shi; Jianquan Yao

doi:10.1117/12.3001446

12 March 2024 High-efficiency, low-threshold mid-infrared Er-doped fiber lasers based on optimized pump wavelength in 1.6-1.7 μm

Junxiang Zhang, Shijie Fu, Quan Sheng, Wenxin Xia, Lu Zhang, Wer Shi, Jianquan Yao

Author Affiliations +

Proceedings Volume 12865, Fiber Lasers XXI: Technology and Systems; 128650X (2024) https://doi.org/10.1117/12.3001446
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

In this work, we demonstrated that a single pump source in the 1.57-1.72 μm band can enable mid-infrared 2.8 μm lasing in Er-doped fluoride fiber via ground state absorption and excited-state absorption. The efficiency evolution of 2.8-μm fiber lasers with respect to pump wavelength was experimentally investigated. The high slope efficiency of ⪆50% and low laser threshold of ⪅0.1 W have been achieved with optimized fiber doping concentration and pump wavelength. This pioneer work paves the way for the further power scaling of mid-infrared 3 μm Er fiber lasers pumped by near-infrared fiber lasers.

Conference Presentation

Citation Download Citation

Junxiang Zhang, Shijie Fu, Quan Sheng, Wenxin Xia, Lu Zhang, Wer Shi, and Jianquan Yao "High-efficiency, low-threshold mid-infrared Er-doped fiber lasers based on optimized pump wavelength in 1.6-1.7 μm", Proc. SPIE 12865, Fiber Lasers XXI: Technology and Systems, 128650X (12 March 2024); https://doi.org/10.1117/12.3001446

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