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Pulsed-laser-diode Intermittently Pumped 2-㎛ Acousto-optic Q-switched Tm:LuAG Laser

  • Wen, Ya (Jilin Key Laboratory of Solid Laser Technology and Application, College of Science, Changchun University of Science and Technology) ;
  • Jiang, Yan (Sichuan Aerospace Fenghuo Servo Control Technology Corporation) ;
  • Zheng, Hao (Jilin Key Laboratory of Solid Laser Technology and Application, College of Science, Changchun University of Science and Technology) ;
  • Zhang, Hongliang (Jilin Key Laboratory of Solid Laser Technology and Application, College of Science, Changchun University of Science and Technology) ;
  • Wang, Chao (Jilin Key Laboratory of Solid Laser Technology and Application, College of Science, Changchun University of Science and Technology) ;
  • Wu, Chunting (Jilin Key Laboratory of Solid Laser Technology and Application, College of Science, Changchun University of Science and Technology) ;
  • Jin, Guangyong (Jilin Key Laboratory of Solid Laser Technology and Application, College of Science, Changchun University of Science and Technology)
  • Received : 2019.10.17
  • Accepted : 2020.04.10
  • Published : 2020.06.25

Abstract

The heat distribution in crystals in a 2-㎛ acousto-optic Q-switched Tm:LuAG laser pumped by pulsed-laser-diode (pulsed-LD) intermittent-pumping technology was analyzed using COMSOL software. The thermal lensing effect of the Tm:LuAG crystal can be mitigated by pulsed-LD intermittent-pumping techniques. An experimental setup using this kind of approach achieved maximum output energy of 8.31 mJ, minimum pulse width of 101.9 ns, and highest peak power of 81.55 kW, reached at a Q-switched repetition rate of 200 Hz. It offers significant improvement of performance of the output laser beam, compared to pulsed-LD double-ended pumping technology at the same repetition rate.

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