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本文建立了一种速率方程模型,以铯蒸气为例描述了半导体抽运碱金属蒸气激光器的阈值特性.经数值求解该模型,定量分析了抽运光束腰位置和半径、蒸气池长度、运行温度等参量对激光器的阈值抽运功率的影响.结果表明,存在最佳的抽运光束腰位置和半径、蒸气池长度以及运行温度使阈值最低,此外改善抽运光束质量也能有效降低阈值抽运功率.所得规律与目前实验事实基本相符,表明了该模型能较好地反映半导体抽运碱金属蒸气激光器的阈值特性,为该类激光器的优化设计提供一定的借鉴和参考.
In this paper, a model of the rate equation is established, and the threshold characteristics of a semiconductor pumping alkali metal vapor laser are described by taking cesium vapor as an example. The model is solved numerically to analyze the positions and radii of the pumping beam waist, the length of the steam pool, Temperature and other parameters on the laser threshold pumping power.The results show that there is the best pumping beam waist position and radius, the length of the steam pool and the operating temperature to the minimum threshold, in addition to improve the pump beam quality can effectively reduce the threshold The results show that the model can reflect the threshold characteristics of the pumped alkali metal vapor laser better and provide some reference and reference for the optimal design of the laser.