Volume 7 Issue 2
Mar.  2014
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JIN Gang, WEN Xin, YANG Bao-dong, HE Jun, WANG Jun-min. Laser intensity stabilization by using of opto-electronic feedback control based on an acousto-optical frequency-shifting system[J]. Chinese Optics, 2014, 7(2): 234-239. doi: 10.3788/CO.20140702.0234
Citation: JIN Gang, WEN Xin, YANG Bao-dong, HE Jun, WANG Jun-min. Laser intensity stabilization by using of opto-electronic feedback control based on an acousto-optical frequency-shifting system[J]. Chinese Optics, 2014, 7(2): 234-239. doi: 10.3788/CO.20140702.0234

Laser intensity stabilization by using of opto-electronic feedback control based on an acousto-optical frequency-shifting system

doi: 10.3788/CO.20140702.0234
  • Received Date: 12 Oct 2013
  • Rev Recd Date: 14 Feb 2014
  • Publish Date: 25 Mar 2014
  • The laser intensity could be stabilized by using opto-electrical feedback based on the acoustic optical shifted modulator outside the laser. Due to the Bragg diffraction effect of an acousto-optical modulator(AOM) on controlling of the laser intensity, the feedback electrical signal from a portion of laser was applied to control the driving power of the AOM realizing the stabilization of laser intensity. The experiment results show that the laser intensity noise under the frequency of 47 kHz can be reduced by 15 dB. In addition, the time response in whole feedback loop is analyzed, and the delay phase curve beside the feedback circuit in the loop is also measured.

     

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