全固态连续波Yb:YGG激光器的理论与实验  

Theory and experiment of all solid-state CW Yb:YGG lasers

作　　者：吕亮[1] 张永东[2] 王军利[1] 张治国[2] 魏志义[1,2] 张怀金[3] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710126 [2]中国科学院物理研究所光物理重点实验室,北京100190 [3]山东大学晶体材料国家重点实验室,山东济南250100

出　　处：《红外与激光工程》2012年第3期596-600,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(10874237)

摘　　要：Yb:Y3Ga5O12(Yb:YGG)晶体是具有优异光谱特性和热力学性能的一种新型激光增益介质。利用准三能级系统速率方程,对激光二极管纵向泵浦的全固态连续波Yb:YGG激光的输出特性进行了理论分析和数值计算。在此基础上设计并进行了该激光的实验研究,采用最佳透过率6%的输出镜,在6.8 W泵浦下得到了2.3 W的最大功率,实验结果与理论分析结果吻合,对应中心波长为1037 nm,最大斜效率达71.8%。Laser diodes have attracted great attention in all solid state lasers because they guarantee a compact,cost-efficient,and reliable system.Ytterbium（Yb） doped rare-earth garnet Y3Ga5O12（Yb：YGG） crystal is one of the ideal new laser gain materials because of the wide emission band and excellent thermal conductivity.According to the rate equation of quasi-three-level system,the output characteristic of longitudinally pumped continuous wave（CW） Yb：YGG solid state laser was theoretically analyzed.The relationship between incident pump power and ouput power based on output coupler（OC） was numerically calculated without considering the re-absorption loss.Based on this work,a LD pumped Yb：YGG CW laser was experimental carried out with three different OC.With the optimum transmission 6%（OC）,laser average output power up to 2.3 W was obtained with the incident power 6.8 W,which was well agreement with the numerical result.The laser operated at central wavelength of 1 037 nm with maximum slope efficiency of 71.8%.

关 键 词：激光二极管泵浦 Yb:YGG激光器 准三能级系统 

分 类 号：TN248.1[电子电信—物理电子学]