低温冷却高平均功率Yb:YAG激光器  

Cryogenically Cooled High Average Power Yb:YAG Laser

作　　者：吴武明[1] 吴慧云[1] 许晓军[1] 郭少锋[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《激光与光电子学进展》2010年第7期42-47,共6页Laser & Optoelectronics Progress

基　　金：国防科技预研基金(513260102)资助课题

摘　　要：工作物质的热效应是半导体抽运固体激光器向更高输出功率发展的瓶颈之一。介绍了能够同时实现高平均功率和高光束质量输出的低温冷却Yb:YAG固体激光器。总结了这种激光器阈值低、光学畸变小、效率高、能定标放大等突出优点。详细分析了Yb:YAG晶体在低温下的各种热力学和光谱性质,这些优异特性使激光器具有较小的热畸变和高效率的激光输出。最后比较了3种不同冷却方法,综述了高平均功率低温冷却Yb:YAG激光的最新研究进展。Thermal effects in solid state laser media have become a bottleneck of the development towards high power for diode-pumped sold state laser.The cryogenically cooled Yb：YAG solid state laser can realize high average power and good beam quality.Its advantages including low laser threshold,high efficiency and scalable output,are summarized.The thermo-optic and spectroscopic properties of Yb：YAG crystal at lower temperatures are analyzed,which makes it possible to provide efficient laser sources with small thermal effect.Finally three different cooling methods are compared and the progress in cryogenically cooled high average power Yb：YAG laser is presented.

关 键 词：固体激光器 YB:YAG晶体 低温冷却 高平均功率 热力学和光谱性质 冷却方法 

分 类 号：TN248.1[电子电信—物理电子学]