为了研究Cr，Tm，Ho∶YAG激光器输出脉冲能量和晶体温度的关系，利用有限元的方法计算了不同制冷温度和抽运功率情况下晶体内温度的分布，从而分析温度分布对激光实验输出的影响。控制制冷液温度在15℃、重频5Hz时，获得最大能量为217mJ的脉冲输出，斜效率约为1．4%；而重频10Hz时，最大单脉冲输出仅为56mJ，斜效率约为0．9%。结果表明，制冷温度和频率的增加都将大大增加激光的抽运阈值，同时降低输出效率。

To get the relation between output pulse energy and laser crystal temperature about a flash lamp pumped Cr,Tm,Ho∶YAG laser with a plane-plane cavity,the temperature distribution of the laser crystal was calculated for the different cooling temperatures and pump frequencies by means of finite element method. At 15℃ and 5Hz,the maximum output pulse energy and slope efficiency were 217mJ and 1.4% respectively. However,at lOHz,the maximum output pulse energy and slope efficiency were 56mJ and 0.9% respectively. The results show that pump threshold increases and output efficiency decreases with the increase of temperature and frequency.