2.6 kW×2 high power bidirectional output fiber laser oscillator

Penglin Zhong; Bailai Yang; Xiaoming Xi; Hanwei Zhang; Peng Wang; Chen Shi; Xiaolin Wang

doi:10.1117/12.2654852

15 December 2022 2.6 kW×2 high power bidirectional output fiber laser oscillator

Penglin Zhong, Bailai Yang, Xiaoming Xi, Hanwei Zhang, Peng Wang, Chen Shi, Xiaolin Wang

Proceedings Volume 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022); 124783N (2022) https://doi.org/10.1117/12.2654852
Event: Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 2022, Xi'an, China

Abstract

Fiber laser oscillators play a vital role in industrial processing, national defense research and other fields. Traditional high power fiber oscillator lasers can only achieve unidirectional output, which is determined by the resonator structure. We propose a new structure that is simple and compatible with the ordinary fiber laser oscillator, which can achieve double high power laser output with only one resonant cavity. Typically, the resonant cavity of all-fiber laser oscillator contains a high- reflectivity grating and a low-reflectivity grating. Briefly, by replacing the high inverse grating with a low inverse grating, the unidirectional output laser oscillator can be converted into a b-directional output laser oscillator. It is suitable for applications that do not require high power and can have multiple lasers working at the same time, because of the smaller size and lower cost. We select a double-cladding Yb-doped fiber with 25/400 μm core/cladding diameter. The length of fiber is 35 m and its absorption coefficient is 0.33 dB/m at the wavelength of 915 nm. By means of bi-directionally pumping with 981 nm laser diodes, the maximum output power at both ends is 2871W and 2666 W respectively. We believe that with the further study of stimulated Raman scattering and transverse mode instability, bidirectional output lasers can achieve higher power outputs.

Citation Download Citation

Penglin Zhong, Bailai Yang, Xiaoming Xi, Hanwei Zhang, Peng Wang, Chen Shi, and Xiaolin Wang "2.6 kW×2 high power bidirectional output fiber laser oscillator", Proc. SPIE 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 124783N (15 December 2022); https://doi.org/10.1117/12.2654852

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