【摘要】 通过对激光二级管阵列双端抽运热容激光器晶体的分析,建立了热传导模型及边界条件.利用有限元方法模拟了晶体的温度场分布,并分别对抽运光斑直径、抽运持续时间、抽运光强和晶体端面尺寸等因素对温度场分布的影响进行了分析,得到了热容工作模式下的激光器温度特性.结果表明,晶体端面温差随抽运光斑直径的增大先增后减,存在一个极大值,并且在不同抽运光强下,出现端面温差极大点时的抽运光斑直径不变.更多还原

【Abstract】 Based on analyzing working characteristics of laser diode array double-end-pumped heat-capacity laser crystal,the laser crystal thermal model and the boundary condition are built.The factors which affect the laser crystal′s temperature field distribution,such as the pumping facula diameter,the pumping duration, the pumping light intensity and the crystal end-face size,are simulated and analyzed by Finite Element Method.The temperature characteristics of the laser crystal working in heat capacity mode are obtained.The results show that with the increases of the pumping facula diameter,the temperature difference between the center and the edge of crystal end-face will increase and then decrease and it will get a maximum.With the different pumping light intensity,the pumping faculae diameters having the biggest temperature difference are the same.The conclusions of this research are advantageous to reasonably choose various factors,and provide references for designing heat capacity laser and solving the laser induced thermal lens effects.更多还原