研究了级联三能级原子与单模相干光场相互作用系统中场相位的动力学特性，讨论了原子运动和场模结构以及原子－光场耦合强度对光场相位概率分布和相位扩散的影响。研究结果表明：场相位的动力学特性不仅决定于原子－光场的耦合强度，而且通过时间因子决定于原子的运动速度与场模结构参量。

The dynamical properties of light phase in the system of a cascade three-level atom interacting with a single-mode coherent state field are studied. The influence of the atomic motion,the field-mode structure,and the intensity of the atom-field coupling on the phase probability distribution and the phase diffusion are discussed. The results show that the dynamical properties of light phase are determined not only by the intensity of the atomfield coupling,also by the velocity of the atomic motion and the parameter of the field-mode structure through the time factor g■(t)=2^－1gt－(4εp)^－1sin(2εpgt).