Ye Chenguang, Zhang Jing
The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan, China.
Opt Lett. 2008 Aug 15;33(16):1911-3. doi: 10.1364/ol.33.001911.
We investigate experimentally the absorptive and dispersive properties of the triple-resonant optical parametric amplifier (OPA) for the degenerate subharmonic field. In the experiment the subharmonic field is utilized as the probe field and the harmonic wave as the pump field. We demonstrate that the electromagnetically induced transparency (EIT)-like effect can be simulated in the triple-resonant OPA when the cavity linewidth for the harmonic wave is narrower than that for the subharmonic field. However, this phenomenon cannot be observed in a double-resonant OPA. The narrow transparency window appears in the reflected field. Especially in the measured dispersive spectra of the triple-resonant OPA, a very steep variation of the dispersive profile of the subharmonic field is observed, which can result in a slow light as that observed in an atomic EIT medium.
我们通过实验研究了用于简并次谐波场的三共振光学参量放大器（OPA）的吸收和色散特性。在实验中，次谐波场用作探测场，谐波用作泵浦场。我们证明，当谐波的腔线宽比次谐波场的腔线宽窄时，三共振OPA中可以模拟出类似电磁感应透明（EIT）的效应。然而，这种现象在双共振OPA中无法观察到。窄透明窗口出现在反射场中。特别是在三共振OPA的测量色散光谱中，观察到次谐波场色散分布的非常陡峭的变化，这可能导致像在原子EIT介质中观察到的那样的慢光。
