激光二极管端面泵浦Nd：YVO_4/YVO_4复合晶体激光器热效应研究  

Diode-end-pumped Nd:YVO_4/YVO_4 Composite Crystal Lasers

作　　者：李明真[1] 朱占收[1] 

机构地区：[1]德州学院物理系,山东德州253023

出　　处：《东莞理工学院学报》2007年第5期33-36,51,共5页Journal of Dongguan University of Technology

摘　　要：针对Nd:YVO_4/YVO_4复合晶体热传导的实际特点,提出了三维各向异性热传导模型,计算出晶体中的温度场分布.定量分析了LD端面泵浦条件下激光晶体的长度及折射率与温度变化的关系,得到晶体在不同泵浦功率下的热焦距.在此基础上,采用三镜折叠腔,设计出高转换效率KTP腔内倍频连续绿光激光器.当泵浦功率17W时,得到9.33W 1064nm和5.01W 532nm的激光输出,最高光-光转换效率分别为59.1%,34.4%.理论计算及实验结果表明复合晶体能很好地消除热透镜效应,在制造高效稳定的大功率固体激光器中具有重要应用价值.The temperature distribution in Nd：YVO4/YVO4 diffusion bonding crystal was obtained numerically by three dimensional anisotropic thermal conduction model. The thermal effect in LD end-pumped laser crystal was analyzed numerically and the foci at different pump powers were obtained. Based on the calculation, a V-fold cavity Nd：YVO4/YVO4/KTP green laser with intra-activity frequency doubling was designed. By the maximum output power of 9.33W at 1064 nm, 5.01W at 532 nm were obtained at the pumping power of 17W. The highest optical-optical conversion efficiencies were up to 59.1% at 1064 nm and 34.4% at 52 nm respectively. Diffusion bonding crystal was demonstrated as an effective method of relieving the thermal lens based on the numerical heat analysis and experimental investigation. Nd：YVO4/YVO4 diffusion bonding crystal is expected to have more practical applications in production of high efficient stable solid state lasers.

关 键 词：复合激光晶体 热效应 半导体激光端面泵浦 固体激光 

分 类 号：TN248[电子电信—物理电子学]