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22 December 2023 Numerical investigations of the second-harmonic generation for a 100 J, 1 Hz Nd glass laser in a large-aperture DKDP crystal
Song Zhou, Xiangxu Chai, Guanzhong Wang, Ping Li, Zhitao Peng, Xudong Cui
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Proceedings Volume 12974, Fifth International Symposium on High Power Laser Science and Engineering (HPLSE 2023); 1297406 (2023) https://doi.org/10.1117/12.3014608
Event: Fifth International Symposium on High Power Laser Science and Engineering, 2023, Suzhou, China
Abstract
We present numerical investigations to evaluate the performance of the second-harmonic generation (SHG) for a 100 J, 1 Hz Nd:glass laser operating at 1053 nm under different phase-matching conditions in a large-aperture DKDP crystal. Steady state temperature maps for different crystal length, as well as temperature bandwidth analysis under different phase-matching conditions are presented. Studies show that the SHG efficiency drops due to thermal dephasing for the type-I and type-II configurations are 14.6 % and 3.6 %, respectively. Since the type-I SHG implementation is more straightforward and cost-effective in the laser facility, we focused on how to improve its performance in the present work. Besides some existing routines, we proposed here a new approach to mitigate the thermal dephasing issue, by pre-detuning the phase-matching angle for the DKDP crystal. The results show that performance of type-I SHG can be greatly improved by this new approach, with the efficiency drop being reduced from 14.6 % to 3.9 %. We believe that our findings would be beneficial to the construction of ultra-short, ultra-intense laser drivers with reliability, cost-effectiveness and fewer number of large optics.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Song Zhou, Xiangxu Chai, Guanzhong Wang, Ping Li, Zhitao Peng, and Xudong Cui "Numerical investigations of the second-harmonic generation for a 100 J, 1 Hz Nd glass laser in a large-aperture DKDP crystal", Proc. SPIE 12974, Fifth International Symposium on High Power Laser Science and Engineering (HPLSE 2023), 1297406 (22 December 2023); https://doi.org/10.1117/12.3014608
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KEYWORDS
Crystals
Second harmonic generation
Laser crystals
Nonlinear crystals
Phase matching
Neodymium glass lasers
Frequency conversion
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