论文部分内容阅读
对LD侧边抽运的板条激光介质热效应进行理论分析与数值模拟,根据2.5 mm×14 mm×40 mm Nd∶YAG板条实物建立了相应的三维(3D)热模型,采用有限元方法分析并模拟了板条激光介质内部温度场和热应力的分布,给出在120 W抽运功率下板条激光介质的热畸变特性,估算了在不同抽运功率下热焦距的大小。在此基础上设计并封装了LD侧边抽运的板条激光模块,对该模块的热焦距进行实验研究,得到热焦距随抽运功率变化的测量曲线,实验结果与理论分析一致。
The thermal analysis of the slab laser medium pumped by the LD side is carried out theoretically and numerically. The corresponding three-dimensional (3D) thermal model is established according to 2.5 mm × 14 mm × 40 mm Nd:YAG slab. The finite element method The distributions of temperature and thermal stress in slab laser medium are simulated. The thermal distortion characteristics of slab laser medium at pumping power of 120 W are given. The thermal focal length at different pumping powers is estimated. On this basis, a lath laser module was designed and packaged on the side of LD, and the thermal focal length of the module was experimentally studied. The measurement curve of the thermal focal length with the pumping power was obtained. The experimental results are consistent with the theoretical analysis.