Thermal effects in kilowatt all-fiber MOPA.

Abstract

Thermal effects and output power characteristics of kilowatt all-fiber master-oscillator power amplifier (MOPA) are investigated. Proper designs for cooling apparatus are proposed and demonstrated experimentally, for the purpose of minimizing splice heating which is critical for the reliability of high power operation. By using these optimized methods, a thermal damage-free, highly efficient ytterbium-doped double-clad fiber MOPA operating at 1080 nm with 1.17 kW output was obtained. The maximum surface temperature at the pump light launching end splice of the booster amplifier was 345 K, and the temperature rise for this key splice was 0.052 K/W.

DOI: 10.1364/OE.19.015162

Cite this paper

@article{Fan2011ThermalEI, title={Thermal effects in kilowatt all-fiber MOPA.}, author={Yuanyuan Fan and Bing He and Jun Zhou and Jituo Zheng and Houkang Liu and Yunrong Wei and Jingxing Dong and Qihong Lou}, journal={Optics express}, year={2011}, volume={19 16}, pages={15162-72} }