Influence of propagation on the coherent accumulation of excitation induced by an ultrashort pulse train

Journal Article · Wed Jul 15 04:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.80.013832· OSTI ID:21313350

Soares, A A; Araujo, Luis E. E. de ^[1]

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1. Universidade Federal de Sao Carlos, Campus Sorocaba, 18052-780 Sorocaba, SP (Brazil)

We study the effects of propagation through an extended sample of two- and three-level atoms on the coherent accumulation of excitation by an ultrashort pulse train. In the two-level case, previous pulses in the train may prepare the medium such that a later pulse may experience amplification and absorption in different positions inside the sample. For a large number of pulses, the atomic medium may be saturated by the train, and some pulses propagate without experiencing either absorption or amplification. In general, absorption of the resonant pulse frequency during propagation compromises the accumulation efficiency. In the three-level case, the coherent accumulation of excitation leads to electromagnetically induced transparency of the pulse train, and the pulses exit the medium without any distortion in their temporal profile.

• OSTI ID: 21313350
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 80; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
AMPLIFICATION
ATOMS
BUILDUP
EFFICIENCY
EXCITATION
OPACITY
PHOTON-ATOM COLLISIONS
PULSES