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A. NOFERESTI1, M. KAVOSH TEHRANI1, A. MALEKI1,*
- Faculty of applied science, Malek Ashtar University of Technology, Iran
In this paper, the free-running of a LED-pumped Nd:YAG laser optically side pumped by low divergence angle and medium scale power infrared-LEDs at 810 nm is presented. In this design, a special arrangement for LED-pumping is introduced. For this purpose, 30 arrays are used with 18 LEDs in each array. The LEDs have an optical system, a divergence angle of 20 degrees and a wavelength of 810 nm with a spectral width of 30 nm. LEDs with an optical system, due to a lower divergence angle than those without an optical system, can still enter a significant amount of light into the active medium of the laser at distances far from the surface of the rod. As a result, they lead more output power to compare with the same state in LED without an optical system. Simulations for arrangements of 6-sided, 12-sided, 18-sided, 24-sided, and 30-sided pump schemes for two LED modes with and without an optical system for two laser rods with diameters of 3 and 7 mm and 95 mm length using ZEMAX and LASCAD software programs are made. Based on the simulated outputs, the most appropriate arrangement was selected for the maximum absorbed pump power with the 30-sided pump, and finally, the output energy was 10mj for the pumped energy of 81mj..
Laser rod, LED-pumped Nd:YAG laser, Ray tracing, Thermal effects, ZEMAX and LASCAD software programs.
Submitted at: March 14, 2022
Accepted at: Feb. 14, 2023
A. NOFERESTI, M. KAVOSH TEHRANI, A. MALEKI, Simulation and experimental study of the side LED-pumped Nd:YAG laser, Journal of Optoelectronics and Advanced Materials Vol. 25, Iss. 1-2, pp. 1-9 (2023)
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