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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Mirrorless coherent oscillation due to six-beam vectorial mixing in photorefractive crystals

A Novikov, V Obukhovski, S Odoulov

    Optics Letters
    |September 12, 2009
    PubMed

    Abstract:

    A cw mirrorless oscillation is observed in a photorefractive LiNbO(3):Cu crystal when the crystal is exposed to two nearly counterpropagating pump waves from an Ar(+) laser. This oscillation is shown to result from a parametric vectorial six-beam interaction in a medium with a photovoltaic nonlinearity.

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