Gain without population inversion in V-type systems driven by a frequency-modulated field

Details Gain without population inversion in V-type systems driven by a frequency-modulated field Gain without population inversion in V-type systems driven by a frequency-modulated field

2002-01-14

arxiv.org/abs/physics/0201029v1

Physics

Optics

10 pages + 8 figures; To appear in Physical Review A

Scientific paper

10.1103/PhysRevA.65.033417

We obtain gain of the probe field at multiple frequencies in a closed three-level V-type system using frequency modulated pump field. There is no associated population inversion among the atomic states of the probe transition. We describe both the steady-state and transient dynamics of this system. Under suitable conditions, the system exhibits large gain simultaneously at series of frequencies far removed from resonance. Moreover, the system can be tailored to exhibit multiple frequency regimes where the probe experiences anomalous dispersion accompanied by negligible gain-absorption over a large bandwidth, a desirable feature for obtaining superluminal propagation of pulses with negligible distortion.

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