受激吸收

本课题所做的工作主要有以下几个方面：首先，从光的发光机理出发，分析了原子的自发辐射、受激辐射和受激吸收，建立了原子跃迁的三能级系统和四能级系统模型。

The subject of the work done mainly in the following areas : First of all , the atomic spontaneous emission , stimulated emission and stimulated absorption were analyzed in the light-emitting mechanism , the atomic transition of the three-level system and the four-level system models were established .

本文在对辐射电磁场量子化的基础上，按照量子力学一级微扰近似方法，着重分析了原子和辐射电磁场相互作用过程，从而导出原子自发发射、受激发射和吸收几率公式。

This paper , based on the Quantization of radiation-electromagnetic field and first-order perturbation approximation of quantum mechanics , centers on the analysis of the mutual functioning process of atoms and radiation-electromagnetic field so as so infer the formulas of spontaneous emission , induced emission and absorption probability .