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Experimental investigation of the photodarkening induced core laser leakage in a 3kW co-pumping fiber amplifier
Author(s): Lingchao Kong; Miao Li; Jinyong Leng; Xiaolin Wang; Pu Zhou; Xiaojun Xu; Jinbao Chen; Zongfu Jiang
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Paper Abstract

We demonstrated photodarkening induced core laser leakage phenomenon in the long term operation of a 3 kW copumping fiber amplifier. Output power perturbation of 4~6 minutes period was observed in the 6 hours maximum power operation. Despite the perturbation, the maximum power also drops from 3 kW to 2.65 kW due to the leakage of the core laser. This indicates that the co-pumping scheme may not be suitable to achieve high power fiber laser with long term output stability. We also provide a solution by adopting the counter-pumping scheme that shows very stable output power in the 1-hour maximum power operation test.

Paper Details

Date Published: 5 October 2017
PDF: 4 pages
Proc. SPIE 10436, High-Power Lasers: Technology and Systems, Platforms, and Effects, 104360N (5 October 2017); doi: 10.1117/12.2277498
Show Author Affiliations
Lingchao Kong, National Univ. of Defense Technology (China)
Miao Li, National Univ. of Defense Technology (China)
Jinyong Leng, National Univ. of Defense Technology (China)
Xiaolin Wang, National Univ. of Defense Technology (China)
Pu Zhou, National Univ. of Defense Technology (China)
Xiaojun Xu, National Univ. of Defense Technology (China)
Jinbao Chen, National Univ. of Defense Technology (China)
Zongfu Jiang, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 10436:
High-Power Lasers: Technology and Systems, Platforms, and Effects
Harro Ackermann; Willy L. Bohn; David H. Titterton, Editor(s)

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