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25 August 2008 Influence of the temperature distribution in KDP crystal on the second-harmonic generation
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Abstract
Using split-step algorithm based on the fast Fourier transform and a fourth-order Runge-Kutta(R-K) method, we studied the second-harmonic generation(SHG) of high power laser with KDP crystal. The transverse walk-off effect, diffraction, the second-order and the third-order nonlinear effects of KDP crystal have been taken into consideration. Special attention has been paid to the influences of a kind of self-induced thermal effect. The phase mismatching quantity, the intensity distribution of output beam and the frequency conversion efficiency varying with the crystal temperature distribution have been analyzed. The calculated results indicate that self-induced thermal effects results in the temperature distribution in KDP crystal and the phase mismatching, then the phase mismatching leads to the decreasion of the conversion efficiency.
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Wei Li, Guoying Feng, Qiuhui Zhang, Tianxiang Zhang, and Hai Liao "Influence of the temperature distribution in KDP crystal on the second-harmonic generation", Proc. SPIE 7056, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II, 70561G (25 August 2008); https://doi.org/10.1117/12.795217
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