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Experimental research on phase detection and correction of two fiber amplifier based on active segmented mirrors

Yang Ping Shen Feng Yang Ruo-Fu

Experimental research on phase detection and correction of two fiber amplifier based on active segmented mirrors

Yang Ping, Shen Feng, Yang Ruo-Fu
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  • Abstract views:  3683
  • PDF Downloads:  1147
  • Cited By: 0
Publishing process
  • Received Date:  22 February 2009
  • Accepted Date:  08 April 2009
  • Published Online:  05 June 2009

Experimental research on phase detection and correction of two fiber amplifier based on active segmented mirrors

  • 1. (1)中国科学院光电技术研究所自适应光学重点实验室,成都 610209; (2)中国科学院光电技术研究所自适应光学重点实验室,成都 610209;中国科学院研究生院,北京 100049

Abstract: The measurement of piston noise is a critical issue in coherent combining of fiber lasers. This paper presents a strip extracting algorithm, which get the amplitude of phase noise in fiber amplifier. By this algorithm, phase noise of fiber amplifier working in 10-3 W level is measured and real-time controlled by high-speed digital processing circuit and active segment mirrors. Experimental results indicate, that after closing the loop, fringe contrast improves from 0.09 to 0.25, intensity value of piston noise decreases from 1053.4 nm down to 116.7 nm; the calibration precision and bandwidth of the system achieve 1/10λ and ~50 Hz, respectively.

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