多光子过程光强指数的新应用——激发截面估计  

A New Application of Laser Power Index in Multiphoton Processer:estimation of excitation cross sections

作　　者：冉琴[1] 陈旸[1] 张立敏[1] 戴静华[1] 马兴孝[1] 

机构地区：[1]中国科学技术大学化学物理系,合肥230026

出　　处：《Chinese Journal of Chemical Physics》1996年第2期104-112,共9页化学物理学报（英文）

基　　金：国家自然科学基金资助课题

摘　　要：本文针对多光子过程产物信号随激光强度变化的特征,提出了一个利用测得的产物信号的激光强度依赖关系来估算多步多光子过程的激发截面的简单方法.该估算方法是从两步多光子吸收过程的动力学模型中导出的,并可以合理地推广到任意多步的多光子过程.我们用一些数值模拟计算和实验的结果进一步验证了该方法的合理性.In this paper, the general characteristics of laser power index of product signal in multphoton processes were discussed and a new method to estimate excitation process by analyzing the variation of power indew with laser intensity were proposed. The validity of this method is theoretically demonstrated by means of the rate equations based upon a two-step kinetic model and some numerical and experimental results. This method could, in principle, be extended to the multiphoton process with steps more than two.

关 键 词：光强指数 激发截面 多光子过程 

分 类 号：O437[机械工程—光学工程]