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Chin. Phys. B, 2022, Vol. 31(5): 054208    DOI: 10.1088/1674-1056/ac447f

Pump pulse characteristics of quasi-continuous-wave diode-side-pumped Nd:YAG laser

Zexin Song(宋泽鑫)1,2,3, Qi Bian(卞奇)1,2,†, Yu Shen(申玉)1,2,‡, Keling Gong(龚柯菱)1,2, Nan Zong(宗楠)1,2, Qingshuang Zong(宗庆霜)4, Yong Bo(薄勇)1,2, and Qinjun Peng(彭钦军)1,2
1 Key Laboratory of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
2 Key Laboratory of Function Crystal and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
3 University of Chinese Academy of Sciences, Beijing 100190, China;
4 Southwest Institute of Technical Physics, Chengdu 610041, China
Abstract  The influence of pumping laser pulse on the property of quasi-continuous-wave (QCW) diode-side-pumped Nd:YAG laser is investigated theoretically and experimentally. Under remaining a fixed duty cycle, the average output power increases, and the corresponding thermal focal length shorten with the increase of the pump pulse duration, which attributes to the decrease of the ratio of pulse buildup time to the pulse duration. At a pump power of 146 W, the laser output power changes from 65.1 W to 81.2 W when the pulse duration is adjusted from 150 μ s to 1000 μ s, confirming a significant enhancement of 24.7%. A laser rate equation model incorporating the amplified spontaneous emission is also utilized and numerically solved, and the simulated results agree well with the experimental data.
Keywords:  pump pulse duration      diode-side-pumped      pulsed Nd:YAG laser      laser rate equation      amplified spontaneous emission  
Received:  13 October 2021      Revised:  30 November 2021      Accepted manuscript online: 
PACS:  42.55.-f (Lasers)  
  42.55.Xi (Diode-pumped lasers)  
  42.60.Lh (Efficiency, stability, gain, and other operational parameters)  
Fund: Project supported by the National Key Research and Development Program of China (Grant No.2016YFB0402103),the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No.GJJSTD20180004),and the Fund of Technical Institute of Physics and Chemistry,Chinese Academy of Sciences (Grant No.Y8A9021H11).
Corresponding Authors:  Qi Bian,;Yu Shen,     E-mail:;
About author:  2021-12-18

Cite this article: 

Zexin Song(宋泽鑫), Qi Bian(卞奇), Yu Shen(申玉), Keling Gong(龚柯菱), Nan Zong(宗楠), Qingshuang Zong(宗庆霜), Yong Bo(薄勇), and Qinjun Peng(彭钦军) Pump pulse characteristics of quasi-continuous-wave diode-side-pumped Nd:YAG laser 2022 Chin. Phys. B 31 054208

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