Thermal effects in kilowatt all-fiber MOPA

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 h...

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Bibliographic Details
Published in:Optics express 2011-08, Vol.19 (16), p.15162-15172
Main Authors: Fan, Yuanyuan, He, Bing, Zhou, Jun, Zheng, Jituo, Liu, Houkang, Wei, Yunrong, Dong, Jingxing, Lou, Qihong
Format: Article
Language:English
Subjects:
Algorithms
Amplifiers, Electronic
Equipment Design
Fiber Optic Technology - methods
Metals - chemistry
Models, Statistical
Optical Fibers
Optics and Photonics
Oscillometry - methods
Surface Properties
Temperature
Thermal Conductivity
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.015162