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    • Tony Roberts

    Senior Scientist, AdvR

    Tony Roberts is a senior scientist at AdvR (Bozeman, MT).

    FIGURE 1. Backwards QPM can be used in a potassium titanyl phosphate (KTP) waveguide to produce a counterpropagating SPDC source. The pump source propagates from left to right through the waveguide. The KTP waveguide is poled with submicron periods allowing for quasi-phase-matched counterpropagating signal and idler photon pairs. Detection of the backwards propagating idler photon can be used to herald the presence of the forward propagating signal, generating a spectrally pure source of heralded photons.
    Optics

    NONLINEAR OPTICS: NLO waveguide structures advance quantum communications

    Tony Roberts
    May 1, 2013
    Periodically poled nonlinear optic (NLO) crystal waveguides overcome obstacles inherent in bulk NLO devices, generating useful quantum states that support leading-edge quantum...
    (Courtesy of AdvR)
    Three different 2D patterns produced by the output of two orthogonal beam deflectors were captured with a CCD camera. The same deflector technology is used in a 1 × 35 fiber-in, fiber-out EO switch (below).
    Detectors & Imaging

    FIBER-OPTIC INTERCONNECTS: Electro-optic deflection enables 1 × 35 fiber-optic switch

    Tony Roberts
    June 1, 2010
    Poled electro-optic crystals are at the core of a compact fiber-optic switch design that can handle watts of optical power at megahertz switching speeds.