Presentation
9 March 2023 215 mW single-frequency Tm-doped fiber ring laser at 2050 nm
L. Zhang, Q. Sheng, J. Zhang, S. Fu, W. Shi, J. Yao
Author Affiliations +
Proceedings Volume 12400, Fiber Lasers XX: Technology and Systems; 124000M (2023) https://doi.org/10.1117/12.2652825
Event: SPIE LASE, 2023, San Francisco, California, United States
Abstract
A single-frequency Tm-doped fiber laser operating at 2050 nm is demonstrated with a ring cavity scheme. A piece of unpumped Tm/Ho-coped fiber saturable absorber incorporating a high reflectivity fiber Bragg grating, which serves as a narrow bandwidth filter, were inserted inside the cavity to select single longitudinal mode and suppress the mode hopping. By optimizing the length of Tm/Ho-codoped fiber, stable single-frequency lasing at 2050 nm was realized. Under 2 W 1570 nm pump power, 215 mW single-frequency output power was obtained, while the slope efficiency with respect to the launched pump power was 22%. This work shows that using Tm/Ho-codoped fiber or Ho-doped fiber as the saturable absorber, which has a higher absorption above 2 μm, could enhance the mode selection capability thus improve the singlefrequency output power.
Conference Presentation
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
L. Zhang, Q. Sheng, J. Zhang, S. Fu, W. Shi, and J. Yao "215 mW single-frequency Tm-doped fiber ring laser at 2050 nm", Proc. SPIE 12400, Fiber Lasers XX: Technology and Systems, 124000M (9 March 2023); https://doi.org/10.1117/12.2652825
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KEYWORDS
Fiber lasers

Ions

Absorption

Holmium

LIDAR

Thulium

Doppler effect

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