刻螺纹对Nd：YAG晶体棒的热透镜效应影响实验研究  

The experimental investigation of Nd:YAG grooved rods' thermal focal distance

作　　者：高彦伟[1] 刘晓峰[1] 孙年春[1] 黄永宗 李斌 

机构地区：[1]四川大学,成都610064 [2]成都莱普科技有限公司,成都610041 [3]成都东骏激光有限责任公司,成都蒲江611630

出　　处：《激光杂志》2008年第3期6-7,共2页Laser Journal

摘　　要：从理论上分析了Nd:YAG晶体棒内热传导过程以及影响冷却效果的因素,给出了表面刻上螺纹后,对Nd:YAG晶体棒的表面积和表面冷却换热方式的影响。对热焦距进行了测量,与普通的棒的实验结果进行了对比,螺纹棒比普通棒的热焦距大12.9%。用刻螺纹的方法可以增大晶体与冷却液的接触面积同时改变了对流传热方式,有效地降低了棒的热透镜效应。The process of heat conduction of Nd： YAG crystal rods and the factors of cooling efficiency are analyzed theoretically in this paper. The change of the surface area of Nd：YAG crystal rods and the change of the style of thermal cooling exchange are studied as well.The thermal focal distances of grooved rod is measured. Compare with the results of ordinary rods,the result showes that the thermal focal distance has increased 12.9% .This method which groove screw thread can increase the contact area between the rod and the cooling liquid, and change the mode of heat convection, decrease the thermal lens effects of the rods.

关 键 词：固体激光器 对流换热系数 螺纹棒 热焦距 

分 类 号：TN248.1[电子电信—物理电子学]