A 1720-nm ring-cavity Tm-doped fiber laser with optimized output coupling

Lu Zhang; Junxiang Zhang; Quan Sheng; Shuai Sun; Chaodu Shi; Shijie Fu; Xiaolei Bai; Wei Shi; Jianquan Yao

doi:10.1117/12.2582925

5 March 2021 A 1720-nm ring-cavity Tm-doped fiber laser with optimized output coupling

Lu Zhang, Junxiang Zhang, Quan Sheng, Shuai Sun, Chaodu Shi, Shijie Fu, Xiaolei Bai, Wei Shi, Jianquan Yao

Proceedings Volume 11665, Fiber Lasers XVIII: Technology and Systems; 116650E (2021) https://doi.org/10.1117/12.2582925
Event: SPIE LASE, 2021, Online Only

Abstract

We have demonstrated an efficient 1720-nm all-fiber laser with ring-cavity configuration based on commercial Tmdoped silica fiber and 1570-nm in-band pump source. The rate equation model was built up to analyze the laser performance of Tm-doped fiber, which exhibits strong absorption in 1.7-μm region. The results show that efficient laser operation can be achieved through the optimization of output coupling and the length of Tm-doped fiber. By using homemade couplers, we experimentally achieved 2.36-W laser output power under 6-W launched pump power. The slope efficiency with respect to the absorbed pump power and optical efficiency were 50.2% and 39.3%, respectively. Due to the employment of ring resonator, a narrow laser linewidth of ~4 GHz at maximum output power was observed.

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Lu Zhang, Junxiang Zhang, Quan Sheng, Shuai Sun, Chaodu Shi, Shijie Fu, Xiaolei Bai, Wei Shi, and Jianquan Yao "A 1720-nm ring-cavity Tm-doped fiber laser with optimized output coupling", Proc. SPIE 11665, Fiber Lasers XVIII: Technology and Systems, 116650E (5 March 2021); https://doi.org/10.1117/12.2582925

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