Crystal equivalent temperature model in process of nonlinear conversion of laser radiation

25th IUPAP Conference on Computational Physics

物理学;计算机科学

Ryabushkin, O.A.^1,2 ; Myasnikov, D.V.^1,2 ; Baranov, A.I.^1,2

Moscow Inst. of Phys. and Technol., Institutskiy Per. 9, Dolgoprudnyy, 141700, Russia^1

Kotelnikov Inst. of Radio-Eng. and Electronics of RAS, Vvedensky Sq. 1, Fryazino, 141190, Russia^2

关键词: Equivalent temperature;    Exponential decays;    Heat conduction problems;    Nonlinear conversions;    Nonlinear optical crystal;    Parabolic growth;    Radiation intensity;    Theoretical modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/510/1/012031/pdf
DOI  :  10.1088/1742-6596/510/1/012031

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Theoretical modeling was performed for estimation of influence of thermal effects in nonlinear-optical crystals on process of second harmonic generation of laser radiation. Due to absorption of both pump and generated radiation the temperature distribution inside crystal is substantially nonuniform as in cross-section as along its length. Three dimensional heat conduction problem was solved considering two types of heat sources, conditioned by exponential decay and parabolic growth of laser radiation intensity along crystal length. Longitudinal temperature gradient inside crystal is detrimental for process of laser radiation conversion.