Slow light amplification in a non-inverted gain mediumF. Caruso1, I. Herrera2, S. Bartalini2 and F. S. Cataliotti1, 2, 3
1 Laboratorio di Informazione Quantistica, Scuola Superiore di Catania via S. Paolo 73, I-95123 Catania, Italy
2 European Laboratory for Non-Linear Spectroscopy (LENS) via Nello Carrara 1, I-50019 Sesto Fiorentino (FI), Italy
3 Dipartimento di Fisica, Università di Catania - via S. Sofia 64, I-95124 Catania, Italy
received 18 October 2004; accepted in final form 26 January 2005
published online 25 February 2005
We investigate the propagation of a coherent probe light pulse through a three-level atomic medium (in the -configuration) in the presence of a pump laser under the conditions for gain without inversion. When the carrier frequency of the probe pulse and the pump laser are in a Raman configuration, we show that it is possible to amplify a slow propagating pulse. We also analyze the regime in which the probe pulse is slightly detuned from resonance where we observe anomalous light propagation.
42.50.Gy - Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption.
42.25.Bs - Wave propagation, transmission and absorption.
82.53.Kp - Coherent spectroscopy of atoms and molecules.
© EDP Sciences 2005