【摘要】 利用开放的V型三能级原子系统密度矩阵运动方程的数值解,从不同角度研究了原子自发辐射诱导相干(SGC)对系统吸收和色散的影响。研究发现,这种相干性可导致无粒子数反转激光(LWI)、电磁感应透明(EIT)和无吸收高色散。研究还表明,这种相干性越强,获得最大无反转增益所需的驱动场Rabi频率的值越大而所需的非相干泵浦速率R的值越小;随着原子退出速率的增大,无反转增益逐渐减小并最终转变为吸收,而且增益减小的速度随这种相干性的增强而加快。更多还原

【Abstract】 By using the numerical solutions of the density matrix equations of motion of an open V-type three-level atomic system,the effects of spontaneously generated coherence(SGC) on absorption and dispersion of the system are investigated in different respects.It is found that the coherence can lead to lasing without inversion(LWI),electromagnetically induced transparency(EIT) and high dispersion without absorption.更多还原