Semiclassical theory of two-photon induced Raman scattering

W. H. Louisell, P. Meystre

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Stimulated two-photon induced Raman scattering (hyper-Raman scattering) in an amplifier consisting of four-level atoms is analyzed semiclassically, via the coupled density matrix and Maxwell equations. We consider conditions typically encountered in the optical regime and in vapors. We show that even in the linear regime, it is characterized by a significant depletion of the atomic ground-state population, thus invalidating perturbative analyses based, for instance, on the nonlinear susceptibility tensor. Two major regimes of operation are found, one in which the population is completely consumed by the interaction ("linear regime"), and one in which the pump laser is depleted ("nonlinear regime"). Both regimes are, however, characterized by small photon conversion efficiencies. The tuning range is also briefly discussed.

Original languageEnglish (US)
Pages (from-to)1015-1025
Number of pages11
JournalPhysical Review A
Issue number3
StatePublished - 1981

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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