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  • Anomalous two-photon spectral features in warm rubidium vapor

    Author(s)
    Perrella, C.
    Light, P. S.
    Milburn, T. J.
    Kielpinski, David
    Stace, T. M.
    Luiten, A. N.
    Griffith University Author(s)
    Kielpinski, David
    Year published
    2016
    Metadata
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    Abstract
    We report observation of anomalous fluorescence spectral features in the environs of a two-photon transition in a rubidium vapor when excited with two different wavelength lasers that are both counterpropagating through the vapor. These features are characterized by an unusual trade-off between the detunings of the driving fields. Three different hypothetical processes are presented to explain the observed spectra: a simultaneous three-atom and four-photon collision, a four-photon excitation involving a light field produced via amplified spontaneous emission, and population pumping perturbing the expected steady-state spectra. ...
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    We report observation of anomalous fluorescence spectral features in the environs of a two-photon transition in a rubidium vapor when excited with two different wavelength lasers that are both counterpropagating through the vapor. These features are characterized by an unusual trade-off between the detunings of the driving fields. Three different hypothetical processes are presented to explain the observed spectra: a simultaneous three-atom and four-photon collision, a four-photon excitation involving a light field produced via amplified spontaneous emission, and population pumping perturbing the expected steady-state spectra. Numerical modeling of each hypothetical process is presented, supporting the population pumping process as the most plausible mechanism.
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    Journal Title
    Physical Review A
    Volume
    94
    Issue
    3
    DOI
    https://doi.org/10.1103/PhysRevA.94.033403
    Subject
    Lasers and Quantum Electronics
    Publication URI
    http://hdl.handle.net/10072/100501
    Collection
    • Journal articles

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