纵向泵浦固体激光介质热透镜效应的理论研究  

THEORETICAL STUDY ON THERMAL BEAM FOCUSING IN LONGITUDINALLY-PUMPED SOLID-STATE LASER RODS

作　　者：余锦[1] 檀慧明[1] 钱龙生[1] 刘伟仁[1] 

机构地区：[1]中国科学院长春光学精密机械研究所,长春130022

出　　处：《强激光与粒子束》2000年第1期27-31,共5页High Power Laser and Particle Beams

基　　金：国家 8 63激光技术领域及青年科技基金资助课题

摘　　要：在分析了纵向泵浦、周边致冷固体激光棒内加热及冷却机理的基础上 ,将热传导方程简化为一维形式 ,求解出以级数方式表达的棒内温度分布 ,获得了激光棒中热致应力场和应变场。考虑热色散、热致应力双折射和端面变形 ,推导出纵向泵浦固体激光棒有效热焦距的解析表达式。将所获结果运用于常用的激光晶体 Nd∶ YAG,发现当使用 1 0 W半导体激光器泵浦时 ,所产生的有效热焦距在毫米量级。Temperature distribution within a longitudinally pumped and edge-cooled solid state laser rod is obtained in the form of power series. The factors concerning with thermal beam focusing are discussed and the effective focal length of the thermal lens is derived. A longitudinally pumped Nd:YAG rod is illustrated as an example and the results show that 10W of pump power is predicted to cause a thermal focal length in the order of millimeters. [WT5”HZ]

关 键 词：纵向泵浦 热透镜效应 有效热焦距 激光介质 

分 类 号：TN241[电子电信—物理电子学]