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

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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. (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)   

  1. 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: 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)