论文部分内容阅读
基于一种LD端面泵浦Nd:YVO4激光器,设计了一种热沉结合外部风扇散热的风冷式热管理结构,并利用有限元分析方法对Nd:YVO4晶体的温度场进行了数值模拟,分析了环境温度及界面热阻变化对晶体热致效应的影响。模拟结果表明,晶体泵浦区的温度梯度约为17℃,当环境温度升高时,所设计的冷却方案仍能满足系统的散热需求。在此基础上,介绍了一种高效率、小型化风冷调Q激光器的实验装置和实验结果,在泵浦功率为30W时,获得了连续输出功率为14.2W的1064nm基模激光输出,同时,在10kHz重复频率声光调Q下,得到6.53W的准连续基模激光输出。总体光-光转换效率达47.3%,输出激光功率稳定性高,尤其适合工业加工集成应用。
Based on an LD end-pumped Nd: YVO4 laser, an air-cooled thermal management structure combining heat sink with external fan was designed. The temperature field of Nd: YVO4 crystal was numerically simulated by finite element analysis Influence of Ambient Temperature and Interfacial Thermal Resistance on Thermal Induced Effect of Crystals. The simulation results show that the temperature gradient of the crystal pumped area is about 17 ℃. When the ambient temperature rises, the designed cooling solution can still meet the cooling requirements of the system. On this basis, the experimental setup and experimental results of a high-efficiency and small-size air-cooled Q-switched laser are introduced. When the pump power is 30W, a 1064nm fundamental laser output with continuous output power of 14.2W is obtained, meanwhile, , At 10kHz repetition rate acousto-optic Q-switched, 6.53W quasi-continuous base mode laser output. Overall light - light conversion efficiency of 47.3%, high output laser power stability, especially for integrated industrial applications.