Self-induced transparency in two-photon transition

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Abstract

The propagation of two pulses in a three-level absorber is treated by using Maxwell's equations and an effective "two-photon Bloch equations" which are analogous to the one-photon Bloch equations, except for two-photon coupling and frequency shifts. I derive relaxation-dependent shifts in the equilibrium 2nπ Lorentzian pulses. Part of these shifts depends on weighted time integrals of harmonics of the area and hence remove the propagation degeneracy of pulses having equal areas but different shapes. Absorption of small-area pulses is studied as a function of absorption length, input energies, and relaxation, and it is found that a local enhancement in the transmission occurs as a function of the absorption length.

Original languageEnglish (US)
Pages (from-to)2550-2556
Number of pages7
JournalPhysical Review A
Volume18
Issue number6
DOIs
StatePublished - Jan 1 1978

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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