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    Area of Science:

    • Nonlinear Optics
    • Quantum Optics
    • Spectroscopy

    Background:

    • Nonlinear-optical processes can generate correlations between incident light fields.
    • Time-gating is crucial for imaging through scattering media, isolating specific temporal information.
    • Coherent anti-Stokes Raman scattering (CARS) is a nonlinear spectroscopic technique.

    Purpose of the Study:

    • To demonstrate that specific resonant nonlinear-optical processes can produce a cross-correlation function of incident fields.
    • To utilize this cross-correlation property for effective time-gating.
    • To apply this time-gating method for imaging objects obscured by scattering media.

    Main Methods:

    • Investigating resonant nonlinear-optical processes for cross-correlation generation.
    • Implementing a coherent anti-Stokes Raman scattering (CARS) setup as a time gate.
    • Acquiring and reconstructing images of an object hidden by a scattering medium.

    Main Results:

    • Confirmed that selected nonlinear-optical processes yield a cross-correlation function of incident fields.
    • Successfully employed CARS as a time gate to filter scattered light.
    • Achieved image reconstruction of an object previously obscured by scattering.

    Conclusions:

    • Resonant nonlinear-optical processes offer a viable mechanism for generating field cross-correlations.
    • The CARS-based time-gating approach enables effective imaging through scattering environments.
    • This method presents a promising tool for optical imaging in turbid media.