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首页> 外文期刊>Optics Letters >Rapid passage signals induced by chirped quantum cascade laser radiation: K state dependent-delay effects in the v_(2) band of NH_(3)
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Rapid passage signals induced by chirped quantum cascade laser radiation: K state dependent-delay effects in the v_(2) band of NH_(3)

机译:quantum量子级联激光辐射诱发的快速通过信号:NH_(3)的v_(2)波段中的K状态依赖延迟效应

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摘要

In this Letter, a 10 (mu)m quantum cascade laser operating in the intrapulse mode is used observe rapid passage (RP) effects within a 40 cm single-pass gas cell containing low pressures of NH_(3). The laser tuning range allows the rotational states J velence 2 with K velence 0, 1, and 2 to be probed. We show that the RP structures change as a function of optical density and that the magnitude of the delay in the switch from absorption to emission as a function of increased gas pressure is dependent upon the initial value of K. These measurements are qualitatively well modeled using the Maxwell-Bloch equations.
机译:在这封信中,使用了在脉冲内模式下工作的10μm量子级联激光器,观察包含NH_(3)低压的40 cm单通气室中的快速通过(RP)效应。激光调谐范围允许探测具有K速度0、1和2的旋转状态J速度2。我们表明,RP结构随光密度的变化而变化,并且从吸收到发射的转换中延迟的大小随气压的增加而变化,这取决于K的初始值。 Maxwell-Bloch方程。

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