为研究半导体激光抽运碱金属蒸气激光器(DPAL)中抽运光和激光光束匹配对光-光转换效率和斜率效率的影响，在三能级速率方程模型的基础上，用介质内抽运光光强空间分布代替以往简化模型中所用的介质内平均光强，建立了考虑抽运光和激光光强的轴向分布的一维DPAL 计算模型和考虑抽运光和激光光强的轴向分布及抽运光在介质中聚焦引起的光强和光斑半径的分布的三维DPAL 计算模型。一维模型的计算结果表明，抽运阈值较简化模型结果减小，斜率效率变化不大。三维模型计算结果表明，当抽运光全部在激光的模体积内，斜率效率最大，因此在DPAL 实际运转中，优化抽运光的焦参数和激光腔参数，可以提高抽运光的转换效率。

In order to study on the influence on the optical-optical efficiency and slope efficiency of the mode match of pump and the laser beam in laser diode pumped alkali vapor laser (DPAL), based on the three level rate equation model, instead of the simplified model with average intensity in the medium, the spatial distribution of pump light intensity in the medium is used, and the one dimension DPAL calculation model considering the axial distribution of pump and the laser intensity and the three dimension DPAL calculation model are established considering the distribution of pump in the medium focusing caused by light intensity and the spot radius. The calculation results of the 1D model show that pump threshold in decreasing, the slope efficiency changes little compared with the simplified model. The calculation results of the 3D model show that when the pump mode volume all in the laser the slope efficiency reach the maximum, therefore in the DPAL actual operation, optimization of focal parameters and laser cavity parameters can improve the pump conversion efficiency.