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本文给出了有初始相干性注入的Ｖ型无粒子数反转激光系统的非线性注解，分析了 系统参量变化对无粒子数反转激光增益和与探测场相互作用的两能级之间的粒子数差的影 响，我们发现伴随着驱动场Ｒａｂｉ频率的增加，粒子数差的变化表现出一个振荡行为，我们对 这一新现象给出了解释．
In this paper, the nonlinear annotation of the V-type particle-free inverted laser system with initial coherence injection is given. The relationship between the variation of the system parameters and the two-level level of non-particle inversion laser gain and the interaction with the detection field The effect of particle number difference, we found that with the increase of Rabi frequency of driving field, the change of particle number shows an oscillatory behavior. We give an explanation of this new phenomenon.