Semiclassical theory of a high-intensity laser.
Semiclassical theory of a high-intensity laser.
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高强度激光的半经典理论。
DOI：
10.1103/physrev.181.618
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发表时间：
1969
期刊：
影响因子：
--
通讯作者：
W. Lamb
中科院分区：
文献类型：
--
作者：
S. Stenholm;W. Lamb
本文将多普勒展宽气体激光器(光脉泽)的半经典Lamb理论的计算推广到单模运转的任意强度。建立了经典电磁场与二能级原子系综的耦合方程，得到了连分式形式的解。它被用来计算强度失谐曲线和原子布居反转密度，作为激光中速度和位置的函数。当激光调谐到共振时，反转密度的速度依赖关系显示出一种以前未知的精细结构，由孔底的“凹凸”组成。这些计算结果与场的微扰展开得到的结果和已知的零速度原子的精确结果进行了比较。文中还讨论了激光输出对慢调制的响应和振荡的形成。
This paper extends the calculations of the semiclassical Lamb theory of a Doppler-broadened gas laser (optical maser) to arbitrary intensities for the case of single-mode operation. The coupled equations of the classical electromagnetic field and an ensemble of two-level atoms are set up, and a solution is obtained in the form of a continued fraction. This is used to compute intensity-detuning curves and atomic population inversion densities as functions of both the velocity and the position in the laser. When the laser is tuned to resonance, the velocity dependence of the inversion density shows a previously unknown fine structure consisting of a "bump" in the bottom of the hole. The calculations are compared to results obtained from a perturbation expansion in powers of the field and exact results known for atoms with zero velocity. The response of the laser output to a slow modulation and the buildup of oscillations are also discussed.