摘要Coherent beam combination of three W-level fiber amplifiers with multi-dithering technique is demonstrated. The multi-dithering technique is used for phase control in two channels. In the experiment, two channels are modulated by sine wave with 70kHz and 100kHz respectively, and two regular commercial DSP lock-in amplifiers and an industrial computer are used for electric signal processing in the feedback loop. The fringe contrast is advanced from 12% to 81%, and 78% coherent combination efficiency is obtained when the feedback loop is closed.
Abstract：Coherent beam combination of three W-level fiber amplifiers with multi-dithering technique is demonstrated. The multi-dithering technique is used for phase control in two channels. In the experiment, two channels are modulated by sine wave with 70kHz and 100kHz respectively, and two regular commercial DSP lock-in amplifiers and an industrial computer are used for electric signal processing in the feedback loop. The fringe contrast is advanced from 12% to 81%, and 78% coherent combination efficiency is obtained when the feedback loop is closed.
MA Yan-Xing;LIU Ze-Jin;ZHOU Pu;WANG Xiao-Lin;MA Hao-Tong;LI Xiao;XU Xiao-Jun;SI Lei. Coherent Beam Combination of Three Fiber Amplifiers with Multi-dithering Technique[J]. 中国物理快报, 2009, 26(4): 44204-044204.
MA Yan-Xing, LIU Ze-Jin, ZHOU Pu, WANG Xiao-Lin, MA Hao-Tong, LI Xiao, XU Xiao-Jun, SI Lei. Coherent Beam Combination of Three Fiber Amplifiers with Multi-dithering Technique. Chin. Phys. Lett., 2009, 26(4): 44204-044204.
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2009, Vol. 26 
