摘要
热透镜效应的出现不但限制了激光器输出功率的提高,也使得输出激光的光束质量下降。因此,得到热透镜效应更为精确的解也就成为了降低热透镜效应的关键。采用PDE工具箱和Runge-Kutta方法分别求解热传导方程,得到了端面泵浦圆柱状固体激光器Nd:YAG晶体的温度分布。激光棒内部的最高温升为50.6 K,向四周扩散的过程中温度逐渐降低,最后慢慢趋于稳定。使用两种方法所求得激光棒内部最高点温差为10.4 K,说明使用两种方法所求得的温度分布准确度较高。
The appearance of thermal lensing effect not only limits the out power of the laser,but also decreases the beam quality of the output laser.Therefore,the more accurate solution of the thermal lensing effect becomes the key to reducing the thermal lensing effect. The method of using the PED tool and the Runge-Kutta to solve the heat condition equation had obtained the temperature distribution of Nd:YAG crystal with cylindrical end pumped solid laser.The highest temperature in the laser bar is 50.6 K,and the temperature decreases during the process of diffusion gradually. Finally,it becomes stable slowly. The maximum temperature difference of the highest temperature in the laser bar obtained by two methods is10.4 K,indicating that the temperature distribution obtained by this two method is more accurate.
出处
《齐鲁工业大学学报》
2017年第5期62-65,共4页
Journal of Qilu University of Technology
基金
西安工业大学校长基金(XAGDXJJ14022)
