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LIANG Yinglei, YANG Suhui, ZHAO Changming, ZHANG Haiyang. Research of intensity noise suppression in laser diode pumped Nd:YAG lasers[J]. LASER TECHNOLOGY, 2016, 40(1): 113-117. DOI: 10.7510/jgjs.issn.1001-3806.2016.01.025
Citation: LIANG Yinglei, YANG Suhui, ZHAO Changming, ZHANG Haiyang. Research of intensity noise suppression in laser diode pumped Nd:YAG lasers[J]. LASER TECHNOLOGY, 2016, 40(1): 113-117. DOI: 10.7510/jgjs.issn.1001-3806.2016.01.025
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Research of intensity noise suppression in laser diode pumped Nd:YAG lasers

  • School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China

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  • Received Date: December 09, 2014
  • Revised Date: January 22, 2015
  • Published Date: January 24, 2016
    Graphical Abstract
    • Abstract
  • In order to reduce the relaxation oscillation noise of a diode pumped solid-state laser and improve its stability of output power, the intensity noise was suppressed by means of optoelectronic negative feedback. Theoretical characteristics of laser intensity noise were analyzed. According to the results of theoretical analysis, a proportion-integration-differention(PID) feedback control circuit was designed. By carrying out feedback circuit to suppress the laser intensity noise, ideal experimental data were obtained. When pumped power is 700mW, peak frequency of relaxation oscillation is 300kHz, intensity noise at relaxation oscillation peak and low frequency decreases to 45dB and 15dB respectively. When pumped power is 550mW, relaxation oscillation peak frequency is 250kHz, intensity noise at relaxation oscillation peak and low frequency decreases to 40dB and 10dB respectively. The results shows that the feedback control circuit can effectively reduce intensity noise of a diode pumped solid state laser and improve the stability of laser output power.
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    • References (15)
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