Ultraslow pulse propagation in parametric amplifying media

在一个三能级的Lambda系统中，我们施加了两个满足双光子共振条件的光波(耦合波和探测波)。研究了强耦合功率下参量放大条件下的脉冲传输行为，如脉冲高度、脉冲宽度和脉冲延迟时间。我们还研究了由这两个光波引起的两个超精细能级之间的次能级相干的重要性。

In a three-level Lambda system, we apply two optical waves (couplingwave and probe wave) satisfying the two-photon resonance condition. We investigate thepulse propagation behaviors such as pulse height, pulse width and pulse delay time underparametric amplification conditions with a strong coupling power. We also investigatethe importance of the sublevel coherence between the two hyperfine levels induced by the two optical waves.