Sr原子M-M跃迁激光的动力学模型  

A kinetics model for metastable-metastable transition laser in Sr atom vapor

作　　者：陈钢[1] 冯鉴 潘佰良[1] 姚志欣[1] 

机构地区：[1]浙江大学物理系,杭州310027 [2]杭州工人业余大学,杭州310003

出　　处：《物理学报》2005年第7期3149-3153,共5页Acta Physica Sinica

基　　金：惯性约束聚变技术探索基金(批准号:2004AA84TS04);国家自然科学基金(批准号:10374081);中国博士后科学基金(批准号:2004036482)资助的课题.~~

摘　　要：建立了一个反映高频脉冲放电激励的Sr原子M M跃迁激光的动力学模型,阐明了各激光谱线上能级的主要抽运途径:其中3.01μm上能级是在放电脉冲早期通过更高能级的自发辐射和激光跃迁得到布居,而另3条谱线的上能级主要是通过余辉期一价Sr离子和电子的碰撞复合以及He和三重态Sr原子的混和碰撞实现布居.定量的计算结果与实验测量结果相一致,圆满解释了各种光脉冲的时间延迟关系.A self-consistent physical model has been developed to simulate the kinetics in a high-repetition frequency, dischargeexcited Sr atom metastable-metastable transition laser. The main pumping mechanism for each upper laser level has been clarified: the upper level of 3.01 mu m is pumped mainly by the spontaneous and stimulated emissions from the higher levels in early discharge pulses, while the upper levels of the other 3 laser lines are chiefly populated through the recombination between the univalent Sr ions and electrons in the afterglow, and the collision mixing between neutral He and Sr atoms in compound triplet. The quantitative results predicted by the model are found to be in good agreement with the previous experimental results. Furthermore, the temporal behavior of each laser pulse is explained successfully by the simulation results.

关 键 词：动力学模型 Sr 原子 脉冲放电激励 激光跃迁 自发辐射 放电脉冲 激光谱线 实验测量 计算结果 时间延迟 能级 三重态 光脉冲 布居 碰撞 He 电子 离子 

分 类 号：O432.12[机械工程—光学工程]