摘要
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。
A thermal management configuration for an air cooling LD end-pumped Nd：YVO4 laser was designed,where the heat was dispersed by adjacent heat sink and outer fans.By means of finite element analysis,thermal distributions in laser crystal were simulated.The influences of environment temperature and interfacial heat resistance on thermal induced effects were also discussed.The simulation results show that the temperature gradient within pumping area is about 17 ℃.The cooling scheme can work well when environment temperature increases.Based on the analytic results of thermal effects,a high efficiency and compact air cooling Q-switch laser was designed to obtain continuous output power of 14.2 W at the wavelength of 1 064 nm with M2 factor of 1.01 when pump power was 30 W and quasi-CW power of 6.53 W at repetition frequency of 10 kHz when modulated by an acoustics optic Q-switch.And total optical-optical efficiency is about 47.3%.The output power is stable and it fits to industry processing application.
出处
《红外与激光工程》
EI
CSCD
北大核心
2011年第3期424-428,共5页
Infrared and Laser Engineering
基金
海淀园博士后专项基金资助课题(2008-3)
