激光脉冲的量子整形与相干控制  

Coherent control and quantum shaping with the laser pulse

作　　者：阿布力米提.吾买尔 任立庆[1] 张敏华[1] 许康[1] 李永放[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2011年第1期27-32,共6页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省自然科学基金资助项目(2007A04);陕西师范大学优秀博士论文基金资助项目(X2009YB09)

摘　　要：研究了小激光脉冲面积光场与三能级原子系统的相互作用过程,分析了整形脉冲的形成机理与特征,讨论了能级弛豫以及整形介质长度等参量对输出光场的影响.依据色散理论,分析了瞬态双光子跃迁几率的振荡现象.结果表明:随着介质长度(l)、频宽(Δω)和弛豫时间(t2)等参量的变化,瞬态双光子跃迁几率发生有规律的变化,同时出现跃迁几率的瞬时振荡现象.The interaction between the laser pulse with a small-area and a three-level atomic system is investigated.The formation and characterization of the shaped laser pulse are analyzed and the two-photon transition is studied with the shaped laser pulse.The influence of the relaxation of the excited state and the length of the shaping medium on the two-photon absorption is discussed.Based on the dispersion theory the oscillation of the transient twophoton transition is explained.The result indicates that the transition probability of two-photon absorption evolves regularly with the several values of parameters such as the length of medium（l）,relaxation time（t2） and bandwidth（Δω）.Meanwhile the transition probability appears in the transient oscillation.

关 键 词：激光脉冲 双光子跃迁 量子整形 相干控制 

分 类 号：O431.2[机械工程—光学工程]