Abstract A novel scalable architecture for coherent beam combining with hybrid phase control involving passive phasing and active phasing in master oscillator-power amplifier configuration is presented. Wide-linewidth mutually injected passive phasing fibre laser arrays serve as master oscillators for the power amplifiers, and the active phasing using stochastic parallel gradient descent algorithm is induced. Wide-linewidth seed laser can suppress the stimulated Brillouin scattering effectively and improve the output power of the fibre laser amplifier, while hybrid phase control provides a robust way for in-phase mode coherent beam combining simultaneously. Experiment is performed by active phasing fibre laser amplifiers with passive phasing fibre ring laser array seed lasers. Power encircled in the main-lobe increases1.57 times and long-exposure fringe contrast is obtained to be 78% when the system evolves from passive phasing to hybrid phasing.
Fund: Project supported by the Innovation Foundation for Graduates in National University of Defense Technology, China (Grant No. B080702).
Cite this article:
Wang Xiao-Lin(王小林), Zhou Pu(周朴), Ma Yan-Xing(马阎星), Ma Hao-Tong(马浩统), Xu Xiao-Jun(许晓军), Liu Ze-Jin(刘泽金), and Zhao Yi-Jun(赵伊君) Coherent beam combining of hybrid phase control in master oscillator-power amplifier configuration 2010 Chin. Phys. B 19 094202
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The 260-W coherent beam combining of two compact fibre amplifier chains 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) . Chin. Phys. B, 2011, 20(11): 114203.
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