开放的V型双色泵浦系统原子响应的时间演化

Time Evolution of Atomic Response in an Open Ⅴ-type System with Two-color Pumps

利用数值计算结果研究了具有 2个非相干泵浦的开放的 V型无粒子数反转激光 (L WI)系统中原子响应的时间演化规律。发现 :驱动场耦合的 2个能级上的粒子数布居的时间演化具有相同的振荡频率但位相差为 π;粒子数布居初始值的大小主要影响增益、相干项和粒子数差的振荡幅度并不影响稳定状态时的取值 ;粒子注入速率比的增加将导致稳定状态的增益变大而粒子数差减小 ;

The law of time evolution of atomic response in an open V type lasing without inversion (LWI) system with two incoherent pumps is investigated by the numerical results.Following conclusions are shown:the time evolution of the populations of the two levels coupled by the probe field has the same oscillation frequency,however,exists a phase difference π;the initial values of the populations affect mainly the oscillation amplitudes of the gain,coherent item and population difference but dont affect their values in the steady state;the ratio of the atomic injection rates increasing will results in an increase of the gain and a decrease of the population difference in the steady state;the atomic exit rate increasing will make both the gain and population difference in the steady state decreasing.