Ex) Article Title, Author, Keywords
New Phys.: Sae Mulli 2021; 71: 787-793
Published online September 30, 2021 https://doi.org/10.3938/NPSM.71.787
Copyright © New Physics: Sae Mulli.
Youngin PARK1, Seongsu KIM2, Sungtae PARK2, Jeonghyeon JANG2, Myeongjae JANG2, Hyun Su KIM2*
1R&D Advanced Optical Research Team, Lutronic Corporation, Goyang 10534, Korea
We investigated the optimal parameters of a Q-switched, a composite YAG/Yb:YAG/Cr:YAG laser. In order to design a compact and robust Q-switched Yb:YAG laser, a composite YAG/Yb:YAG/Cr:YAG laser medium fabricated by thermal diffusion bonding was used. The noise term was considered in the rate equation for numerical analysis of the effect of noise magnitude acting as the initial signal of the laser pulse. The optimal laser parameters of a composite YAG/Yb:YAG/Cr:YAG laser were determined through an analysis of a modeled Q-switched laser and the experimental results. The Q-switched laser with laser parameters such as output mirror reflectivity, resonator length, and pump beam size optimised could generate a peak power of 0.63 MW with an output energy of $\sim$1.1 mJ and a pulse duration of $\sim$1.7 ns.
Keywords: Q-switching, Composite crystal, Laser, Laser optimization, Yb:YAG