【摘要】 本文计算了三能级多普勒展宽系统的三阶极化系数,分析了四波混频中泵浦场与信号场的角度情况,给出其反射系数R具有反比于多普勒宽度和均匀线宽比值的结果。在共线情形即θ=0°时,我们分析了非简并的频率转换过程,并获得在均匀线宽限制下,四波混频在三能级系统中具有实时狭窄光场滤波的能力。更多还原

【Abstract】 Third-order susceplibilities are calculated for a Doppler-broadened three-level system in this paper. The dependence of four-wave mixing on the angle 0 between the pump and signal fields is studies, and the reflection coefficient is given to have a narrow field that is inversely proportional to the ratio of the Doppler width to the homogeneous linewidth. In the collinear geometry. θ=0°, the frequency dependence of the nondegenerate case is analyzed and shown capable of yielding a real-time. narrow-bandwidth optical filter whose bandwidth is limited ty the homogeneous linewidth.更多还原