LD端面抽运光变半径YAG-Nd:YAG复合晶体热效应

Thermal effect of composite YAG-Nd:YAG laser crystal with variable gaussian radius by laser diode end-pumped

研究变半径LD泵浦YAG-Nd:YAG复合晶体在实际谐振腔中产生的温度场、形变场和晶体端面热形变场。通过与理论上在理想模型下所求解的结果比较,发现采用变高斯半径构建物理模型,实验值与理论值基本一致,打破了以往高斯半径为定值的局限性。新模型的研究结果:当输出功率为18W时,抽运端面中心获得107.99℃(d=2mm)最高温升和2.78μm(d=2mm)最大热形变量。这种新的研究方法可以更准确地应用到其它激光晶体热问题的研究中,为有效解决激光系统热问题提供了理论依据。

We research the LD-pumped YAG-Nd:YAG crystals with variable radius in the actual cavity arising from the temperature,thermal strain and crystal face thermal deformation field.Compared with the theoretical values,the experiment values are largely according with the theory based on the new physics model using variable Gaussian radius.It breaks through the limitation that the Gaussian radius was a constant before.The new research results show that the maximum temperature rise of 107.99℃ and the maximum thermal...