Parametric measurements of pulsed output energy from the four-level exciplex pumped alkali laser (XPAL) for Cs-Ar, Cs-Kr, and Cs-Xe as a function of input pump energy and temperature show a strong dependence on temperature. All three Cs-rare gas mixtures show a D₂ line laser performance increase with temperature towards a peak efficiency, followed by a decrease as temperature is increased beyond a peak performance point temperature. Prior simulations of Cs-Ar XPAL measurements indicated that energy pooling from the 6²P_3/2 state of Cs was significant at higher temperature and it was hypothesized that the addition of temperature-dependent reaction rates may be important. This paper presents new BLAZE Multiphysics™ simulations using temperature-dependent energy pooling reaction rates baselined to available experimental rate data. Also included are photoionization and Penning ionization reactions. These new calculations for Cs-Ar and Cs-Xe (Cs-Kr not yet simulated) show that the inclusion of temperature-dependent energy pooling rates and the subsequent onset of significant ionization can explain the rise and fall of XPAL performance with temperature with reasonable accuracy. Further, while Cs-Xe has a much stronger absorption characteristic than Cs-Ar, simulations show that the energy well present in the Cs-Xe state increases the fraction of the Cs-Xe B-state relative to the Cs-Ar B-state, thereby resulting in energy output levels of Cs-Xe similar to that of Cs-Ar.

Cs-Ar、Cs-Kr 和 Cs-Xe 的四级激基复合泵浦碱激光器 (XPAL) 的脉冲输出能量作为输入泵浦能量和温度的函数的参数测量显示出对温度的强烈依赖性。所有三种 Cs 稀有气体混合物都显示 D ₂线激光器性能随温度升高而达到峰值效率，然后随着温度升高超过峰值性能点温度而降低。Cs-Ar XPAL 测量的先前模拟表明，来自 6 ² P _3/2Cs 的状态在较高温度下是显着的，并且假设添加与温度相关的反应速率可能很重要。本文介绍了新的 BLAZE Multiphysics™ 模拟，该模拟使用基于可用实验速率数据的温度相关能量池反应速率。还包括光电离和潘宁电离反应。这些对 Cs-Ar 和 Cs-Xe（Cs-Kr 尚未模拟）的新计算表明，包含与温度相关的能量池化率和随后发生的显着电离可以解释 XPAL 性能随温度的上升和下降，并具有合理的准确性。此外，虽然 Cs-Xe 的吸收特性比 Cs-Ar 强得多，但模拟表明，Cs-Xe 中存在的能量很好 态增加了 Cs-Xe B 态相对于 Cs-Ar B 态的分数，从而导致 Cs-Xe 的能量输出水平类似于 Cs-Ar 的能量输出水平。