1.5 kW fiber amplifier employing home-made large-mode-area single trench fiber

Yi An; Yisha Chen; Hu Xiao; Hanshuo Wu; Xiao Chen; Huan Yang; Zhiping Yan; Liangjin Huang; Jinyong Leng; Zhiyong Pan; Zongfu Jiang; Pu Zhou

doi:10.1117/12.2624196

27 March 2022 1.5 kW fiber amplifier employing home-made large-mode-area single trench fiber

Yi An, Yisha Chen, Hu Xiao, Hanshuo Wu, Xiao Chen, Huan Yang, Zhiping Yan, Liangjin Huang, Jinyong Leng, Zhiyong Pan, Zongfu Jiang, Pu Zhou

Author Affiliations +

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121694R (2022) https://doi.org/10.1117/12.2624196
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

Single trench fiber (STF) is one kind of promising novel fibers. In this paper, we design and fabricate a piece of ytterbium-doped STF. The core diameter of the homemade STF is 30 μm and the cladding diameter is 250 μm. Based on this self-developed STF, we have constructed an all-fiberized fiber amplifier that is operating under a continuous-wave regime at 1070 nm wavelength. The maximum output power of the system reaches 1.5 kW, which, to the best of our knowledge, is the highest output power of STF-based laser systems. The M² is measured to be 1.65 at 1.36 kW and 1.92 at the highest output power respectively. The slope efficiency of amplification system is 68%. The performance of the system can be further enhanced by optimizing the fiber design and system structure.

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Yi An, Yisha Chen, Hu Xiao, Hanshuo Wu, Xiao Chen, Huan Yang, Zhiping Yan, Liangjin Huang, Jinyong Leng, Zhiyong Pan, Zongfu Jiang, and Pu Zhou "1.5 kW fiber amplifier employing home-made large-mode-area single trench fiber", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121694R (27 March 2022); https://doi.org/10.1117/12.2624196

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KEYWORDS

Fiber amplifiers

Fiber lasers

Cladding

Fermium

Absorption

Refractive index

Fabrication

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