【摘要】 本文由光学Ｂｌｏｃｈ方程和密度矩阵方程出发，研究了二能级系统共振型简并四波混频（ＤＦＷＭ）的饱和效应，给出了ＤＦＷＭ信号强度与泵浦光强度的函数关系．饱和泵浦光强的大小取决于纵向弛豫时间Ｔ１和横向弛豫时Ｔ２．对理论结果与相应实验进行了比较，表明二者符合得很好．更多还原

【Abstract】 ith the optical Bloch equation and the density-matrix equations,the saturation effect of signal intensity has been studied for resonance degenerate four-wave mixing(DFWM)of two level system,and the signal intensity saturation behavior is obtained as a function of pump field intensity.The value of.the saturation pump intensity is determined by longitudinal relaxation time T1 and transverse relaxation time T2.The theoretical result coincides with experimental result.更多还原