Volume 69, Number 6, March 2005
|Page(s)||938 - 944|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||25 February 2005|
Slow light amplification in a non-inverted gain medium
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
Accepted: 26 January 2005
We investigate the propagation of a coherent probe light pulse through a three-level atomic medium (in the Λ-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.
PACS: 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
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