The 260-W coherent beam combining of two compact fibre amplifier chains

doi:10.1088/1674-1056/20/11/114203

中国物理B ›› 2011, Vol. 20 ›› Issue (11): 114203-114203.doi: 10.1088/1674-1056/20/11/114203

The 260-W coherent beam combining of two compact fibre amplifier chains

王小林¹, 马阎星¹, 周朴¹, 肖虎¹, 许晓军¹, 刘泽金¹, 赵伊君¹, 何兵², 薛宇豪², 刘驰², 李震², 周军²

(1)College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China; (2)Shanghai Institute of Optics and Fine Mechanics, Shanghai 201800, China

收稿日期:2011-02-21 修回日期:2011-06-11 出版日期:2011-11-15 发布日期:2011-11-15
基金资助:
Project supported by the Innovation Foundation for Graduates in National University of Defense Technology, China (Grant No. B080702).

The 260-W coherent beam combining of two compact fibre amplifier chains

Wang Xiao-Lin(王小林)^a)†, Ma Yan-Xing(马阎星)^a), Zhou Pu(周朴)^a), He Bing(何兵)^b), Xue Yu-Hao(薛宇豪)^b), Liu Chi(刘驰)^b), Li Zhen(李震)^b), Xiao Hu(肖虎)^a), Xu Xiao-Jun(许晓军)^a), Zhou Jun(周军)^b), Liu Ze-Jin(刘泽金)^a), and Zhao Yi-Jun(赵伊君)^a)

^a College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China; ^b Shanghai Institute of Optics and Fine Mechanics, Shanghai 201800, China

Received:2011-02-21 Revised:2011-06-11 Online:2011-11-15 Published:2011-11-15
Supported by:
Project supported by the Innovation Foundation for Graduates in National University of Defense Technology, China (Grant No. B080702).

摘要/Abstract

摘要： Coherent beam combining of two fibre amplifier chains with a total power of 260 W in a compact system using the stochastic parallel gradient descent (SPGD) algorithm is demonstrated. A 150 MHz linewidth fibre laser is built and introduced for high-power amplification to mitigate stimulated Brillouin scattering (SBS). Compact high-power amplifier chains are built with low power all-fibre system and high-power bulk free-optics fibre amplifiers. When the total power is about 260 W, active phase-locking of two high-power amplifiers is demonstrated using the SPGD algorithm. In closed-loop, the power in the main lobe increases 1.68 times, the visibility is increased from 0 to 0.62, and the phase residual error is less than λ/10.

关键词: fibre amplifier, coherent beam combining, stimulated Brillouin scattering, stochastic parallel gradient descent algorithm

Abstract: Coherent beam combining of two fibre amplifier chains with a total power of 260 W in a compact system using the stochastic parallel gradient descent (SPGD) algorithm is demonstrated. A 150 MHz linewidth fibre laser is built and introduced for high-power amplification to mitigate stimulated Brillouin scattering (SBS). Compact high-power amplifier chains are built with low power all-fibre system and high-power bulk free-optics fibre amplifiers. When the total power is about 260 W, active phase-locking of two high-power amplifiers is demonstrated using the SPGD algorithm. In closed-loop, the power in the main lobe increases 1.68 times, the visibility is increased from 0 to 0.62, and the phase residual error is less than $\lambda$/10.

Key words: fibre amplifier, coherent beam combining, stimulated Brillouin scattering, stochastic parallel gradient descent algorithm

中图分类号: (Coherence)

42.25.Kb

42.55.Wd (Fiber lasers) 42.65.Es (Stimulated Brillouin and Rayleigh scattering)

王小林, 马阎星, 周朴, 何兵, 薛宇豪, 刘驰, 李震, 肖虎, 许晓军, 周军, 刘泽金, 赵伊君. The 260-W coherent beam combining of two compact fibre amplifier chains[J]. 中国物理B, 2011, 20(11): 114203-114203.

Wang Xiao-Lin(王小林), Ma Yan-Xing(马阎星), Zhou Pu(周朴), He Bing(何兵), Xue Yu-Hao(薛宇豪), Liu Chi(刘驰), Li Zhen(李震), Xiao Hu(肖虎), Xu Xiao-Jun(许晓军), Zhou Jun(周军), Liu Ze-Jin(刘泽金), and Zhao Yi-Jun(赵伊君) . The 260-W coherent beam combining of two compact fibre amplifier chains[J]. Chin. Phys. B, 2011, 20(11): 114203-114203.

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The 260-W coherent beam combining of two compact fibre amplifier chains

The 260-W coherent beam combining of two compact fibre amplifier chains

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