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5 October 2017 Experimental investigation of the photodarkening induced core laser leakage in a 3kW co-pumping fiber amplifier
Lingchao Kong, Miao Li, Jinyong Leng, Xiaolin Wang, Pu Zhou, Xiaojun Xu, Jinbao Chen, Zongfu Jiang
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Proceedings Volume 10436, High-Power Lasers: Technology and Systems, Platforms, and Effects; 104360N (2017) https://doi.org/10.1117/12.2277498
Event: SPIE Security + Defence, 2017, Warsaw, Poland
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.
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Lingchao Kong, Miao Li, Jinyong Leng, Xiaolin Wang, Pu Zhou, Xiaojun Xu, Jinbao Chen, and Zongfu Jiang "Experimental investigation of the photodarkening induced core laser leakage in a 3kW co-pumping fiber amplifier", Proc. SPIE 10436, High-Power Lasers: Technology and Systems, Platforms, and Effects, 104360N (5 October 2017); https://doi.org/10.1117/12.2277498
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KEYWORDS
Fiber amplifiers
Fiber lasers
High power fiber lasers
Laser applications
Thermal effects
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