Coherent combination of two ytterbium fiber amplifier based on an active segmented mirror |
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Authors: | Ping Yang Ruofu Yang Feng Shen Wenhan Jiang |
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Institution: | a Institute of Optics and Electronics, P.O. Box 350, Shuangliu, Chengdu, Sichuan 610209, China b Graduate School of Chinese Academy of Sciences, Beijing 100039, China |
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Abstract: | To control the phase noise of two ytterbium fiber amplifiers, a coherent combination system based on an active segmented mirror (ASM) has been established in our laboratory. The ASM is controlled by a feed back control loop on the basis of a Peak Rate (PR) algorithm which is realized on a DSP + FPGA hardware control board. Experimental results indicate that when the control loop is off, the far-field interference pattern is blurred and dynamic, while when it is on, the far-field beams interference pattern achieves clear and stable. At two different output powers, the contrasts of the interference stripes are improved from 7% to 19% and 8% to 28% respectively. |
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Keywords: | Coherent combination Active segmented mirror PR Interference pattern |
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