A simple O-shaped cylinder fiber laser without inter-cladding-power-strippers

Donglin Yan; Chao Guo; Pengfei Zhao; Rumao Tao; Qiang Shu; Honghuan Lin; Jianjun Wang; Ruoyu Liao

doi:10.1117/12.2601215

9 October 2021 A simple O-shaped cylinder fiber laser without inter-cladding-power-strippers

Donglin Yan, Chao Guo, Pengfei Zhao, Rumao Tao, Qiang Shu, Honghuan Lin, Jianjun Wang, Ruoyu Liao

Proceedings Volume 11890, Advanced Lasers, High-Power Lasers, and Applications XII; 118900H (2021) https://doi.org/10.1117/12.2601215
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

We proposed a simple O-shaped cylinder all-fiber-integrated laser without inter-cladding-power-strippers (CPS) based on a quasi-bidirectional pumping scheme. The fiber grooves were inscribed on the outside of an O-shaped aluminium cylinder with both straight and curved tracks. The curved track with a diameter of 10 cm could suppress the high order modes and keep a stable beam quality with the increases of output power, while the straight parts improve the robustness for fusion points and unpackaged optical components. The simplified configuration of no CPS between the oscillator and the amplifier could also improve the total efficiency. The output power, the optical-to-optical efficiency, the beam quality, and the Raman suppression are systematically investigated. It is verified that this design introduces a practical way to simultaneously improve the transverse mode instability (TMI) and SRS thresholds in a high-power fiber laser system with a simple configuration and high efficiency.

Citation Download Citation

Donglin Yan, Chao Guo, Pengfei Zhao, Rumao Tao, Qiang Shu, Honghuan Lin, Jianjun Wang, and Ruoyu Liao "A simple O-shaped cylinder fiber laser without inter-cladding-power-strippers", Proc. SPIE 11890, Advanced Lasers, High-Power Lasers, and Applications XII, 118900H (9 October 2021); https://doi.org/10.1117/12.2601215

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KEYWORDS

Fiber lasers

Laser systems engineering

Fiber amplifiers

Oscillators

Fiber Bragg gratings

Optical amplifiers

Cladding

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