Current Optics and Photonics

Optical Society of Korea (한국광학회)
권호 표지
DOI QR코드

DOI QR Code

Influences of Pump Spot Radius and Depth of Focus on the Thermal Effect of Tm:YAP Crystal

  • Zhang, Hongliang (College of Science, Changchun University of Technology) ;
  • Wen, Ya (College of Science, Changchun University of Technology) ;
  • Zhang, Lin (College of Science, Changchun University of Technology) ;
  • Fan, Zhen (College of Science, Changchun University of Technology) ;
  • Liu, Jinge (College of Science, Changchun University of Technology) ;
  • Wu, Chunting (College of Science, Changchun University of Technology)
  • Received : 2019.05.16
  • Accepted : 2019.06.05
  • Published : 2019.10.25
Download PDF
⟨ Previous Next ⟩

Abstract

The thermal effect and the light output of a laser crystal under different pumping depths were reported., Based on the thermal model of a single-ended pumped Tm:YAP crystal, the thermal stress coupled model used Comsol to theoretically calculate the effect of changing the pump spot size and pump depth on crystal heat distribution and stress distribution. The experimental results showed that the laser output power first increased and then decreased with increasing pump spot size. As the depth of focus increased, the laser output power first increased and then decreased. The experimental results were consistent with the theoretical simulation results. The theory of pump spot radius and depth of focus in this paper provided an effective simulation method for mitigating thermal effects, and provided theoretical supports for laser crystals to obtain higher laser output power.

Keywords

References

  1. J. Li, S. H. Yang, H. Y. Zhang, D. X. Hu, and C. M. Zhao, "Diode-pumped room temperature single frequency Tm:YAP laser," Laser Phys. Lett. 7, 203-205 (2010). https://doi.org/10.1002/lapl.200910129
  2. Q. Yao, Y. Dong, Q. Wang, and G. Jin, "Beam quality improvement by controlling thermal lens spherical aberration in an end-pumped $Nd:YVO_4$ laser," Appl. Opt. 57, 2245-2249 (2018). https://doi.org/10.1364/AO.57.002245
  3. Q. Pengfei, W. Shiyu, G. Zhen, C. Defang, and L. Bingbin, "Adaptive adjusting technique of thermal effect to laser beam quality," Acta Opt. Sin. 37, 0514001 (2017). https://doi.org/10.3788/AOS201737.0514001
  4. K. Yumashev and P. Loiko, "Thermal stress and end-bulging in monoclinic crystals: the case study of double tungstates," Appl. Opt. 56, 3857-3866 (2017). https://doi.org/10.1364/AO.56.003857
  5. B. Fang, H. Zhulong, L. Jingliang, C. Xinyu, W. Chunting, and J. Guangyong, "Thermal analysis of double-end-pumped Tm:YLF laser," Laser Phys. 25, 075003 (2015). https://doi.org/10.1088/1054-660X/25/7/075003
  6. P. J. Hardman, W. A. Clarkson, G. J. Friel, and M. Pollnau, "Energy-transfer upconversion and thermal lensing in highpower end-pumped Nd:YLF laser crystals," IEEE J. Quantum Electron. 35, 647-655 (2017).
  7. E. Lippert, H. Fonnum, G. Arisholm, and K. Stenersen, "A 22-watt mid-infrared optical parametric oscillator with V-shaped 3-mirror ring resonator," Opt. Express 18, 26475- 26483 (2010). https://doi.org/10.1364/OE.18.026475
  8. L. Jingliang, C. Xinyu, Y. Yongji, W. Chunting, B. Fang, and J. Guangyong, "Analytical solution of the thermal effects in a high-power slab Tm:YLF laser with dual-end pumping," Phys. Rev. A 93, 013854 (2016). https://doi.org/10.1103/PhysRevA.93.013854
  9. G. Chen, "Analytical solutions for temperature and thermalstress modeling of solid material induced by repetitive pulse laser irradiation," Optik 135, 16-26 (2017). https://doi.org/10.1016/j.ijleo.2017.01.079
  10. J. Morris, N. K. Stevenson, H. T. Bookey, A. K. Kar, and A. A. Lagatsky, "1.9 ${\mu}$m waveguide laser fabricated by ultrafast laser inscription in $Tm:Lu_2O_3$ ceramic," Opt. Express 25, 14910-14917 (2017). https://doi.org/10.1364/OE.25.014910