LD角抽运Nd:YAG/YAG复合板条激光器热焦距分析

摘要

为了研究LD角抽运复合板条激光器的热焦距情况,采用有限元方法求解了LD角抽运Nd: YAG/YAG复合板条晶体的热焦距,得到了该晶体的理论温度分布模型和理论热焦距.此外,采用CCD探测法在未出激光的条件下测量了该复合晶体,得到了实验热焦距,并对实验结果和理论计算结果进行了比较.实验中得到的热焦距变化规律与理论计算基本一致.结果表明,这为进一步改善LD角抽运复合板条激光器输出光束质量,以及提高输出功率提供了必要的理论基础.%In order to study the thermal focal length in LD corner-pumped composite slab lasers more clearly,the theoretical temperature distribution and the thermal focal length in a LD corner-pumped Nd: YAG/YAG composite slab were calculated with the finite-element method.Moreover,the thermal focal length of the slab was measured with CCD under non-lasing conditions.A comparison between the theoretical results and the experimental results was made.The result showed that the experimental thermal focal length transformation was in accordance with the theoretical computation.