脉冲对激发的上能级布居振荡  

Population Oscillation of Upper Level Excited by Laser Pulses Pair in Two-Level System

作　　者：方允[1] 余向阳[2] 

机构地区：[1]韶关学院物理系,广东韶关512005 [2]中山大学超快速激光光谱学国家重点实验室,广东广州510275

出　　处：《韶关学院学报》2001年第3期31-36,共6页Journal of Shaoguan University

摘　　要：引入时间演化算符 ,证明均匀增宽二能级体系在飞秒激光脉冲对作用下上能级激发态布居是周期性变化的 ,它以飞秒脉冲对之间的延时为时间轴 。With time evolution operator,it is proved that the population of upper level is in circumstance of cyclic oscillation by laser pulses pair of Gaussian line shape in a homogeneous broadening two level system.The oscillatory time oxide is the delay time between the laser pulse pairs and the oscillatory frequency equals the one of transition between the lower and upper level.

关 键 词：脉冲 布居 振荡 原子 激光 振荡频率 二能级体系 

分 类 号：O432.12[机械工程—光学工程] TN241[理学—光学]