15 May 2012 Dynamic multimode analysis (DMA) of passively Q-switched intracavity frequency-doubling solid state laser
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Abstract
We derive a new model to simulate passively Q-switched intracavity frequency-doubling solid-state laser. By introducing a nonlinear loss term caused by frequency-doubling crystal into the rate equations ,we can express the effect of second-harmonic generation (SHG). We apply a finite volume discretization on gain medium, saturable absorber and frequency-doubling crystal. "Dynamic Multimode Analysis (DMA)" and several Gaussian modes are utilized. At the end, numerical results of passively Q-switched intracavity frequency-doubling solid-state laser are presented. In the case of large pump radius,chaoic phenomenon can be observed numerically. In order to realize the 3D simulation, we mainly use two technics: One is that common rate equations are extended to a set of 3D multimode rate equations, which calculate photon number for different modes separately. The other is to take into account a finite volume discretization.
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Fan Feng, Fan Feng, Christoph Pflaum, Christoph Pflaum, } "Dynamic multimode analysis (DMA) of passively Q-switched intracavity frequency-doubling solid state laser", Proc. SPIE 8434, Nonlinear Optics and Applications VI, 843404 (15 May 2012); doi: 10.1117/12.921852; https://doi.org/10.1117/12.921852
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