激光介质的多次吸收不均匀内热源模型

针对激光介质的内热源,以多次吸收作用为基础提出了适用于侧面双向泵浦板状激光介质的不均匀内热源模型,即多次吸收不均匀内热源模型,并与均匀内热源和一次吸收内热源模型进行了对比分析。研究表明,介质厚度及光吸收系数组成的无量纲参数不同时,三种内热源模型得到的内热源分布也有所不同。最后给出了内热源不均匀度及多次吸收模型与一次吸收模型之间的差异在不同目标值下的内热源模型适用准则。

RE-ABSORPTION NON-UNIFORM HEAT SOURCE FOR LASER SLAB

A non-uniform heat source model, i.e., re-absorption non-uniform heat source model that is based on the re-absorption effect of the pump beam was established for the side-pumped laser slab, and the comparison was conducted with the uniform heat source and the one-absorption non-uniform heat source model. The results show that the non-dimensional parameter which is defined by the thickness and the absorption coefficient of the slab affect the heat source distribution and the applicability of different heat source models. Therefore, the application criterion of the heat source model was put forward.