LD纵向泵浦的946 nm Nd:YAG准三能级激光系统的研究  

Study of Longitudinally LD-pumped 946 nm Nd:YAG Quasi-three-level Laser System

作　　者：禹国俊[1] 姚建铨[1] 郭丽[1] 张百钢[1] 张浩[1] 王鹏[1] 

机构地区：[1]天津大学精仪学院激光与光电子研究所教育部光电信息技术科学重点实验室

出　　处：《量子电子学报》2003年第6期675-679,共5页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(60278001);博士点基金

摘　　要：对准三能级系统进行了研究,分析了激光上、下能级不同的能级寿命以及上能级自发辐射对下能级粒子数所造成的影响,修正了Fan等提出的纵向泵浦准三能级系统的理论模型.进行了数值模拟,得出了系统参数对LD纵向泵浦的946 nm Nd:YAG激光器性能的影响规律。认为在一定掺杂浓度和输出损耗情况下,存在最佳晶体长度使阈值最低,及最佳模式匹配使斜效率最高。理论得到了实验验证.The theoretical model of quasi-three-level system was modified through considering different lifetime of laser upper and lower level and spontaneous radiation from upper level to lower level. Numerical simulation was carried out and the law of 946 nm Nd:YAG laser performance varying with system parameters was obtained. At a certain doping concentration and output loss, there is an optimum crystal length and an optimum ratio of pump and laser beam radii. The experimental results accord with theory analysis.

关 键 词：准三能级系统 LD纵向泵浦 946nmNd:YAG激光器 模式匹配 斜效率 

分 类 号：TN248.13[电子电信—物理电子学]