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    This study introduces an advanced imager using an upconversion single-photon detector, significantly improving imaging through scattering media in noisy conditions. The new detector offers superior noise tolerance for clearer images.

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    Area of Science:

    • Photonics
    • Optical Imaging
    • Quantum Technologies

    Background:

    • Imaging through scattering media presents significant challenges, particularly in noisy environments.
    • Conventional imaging systems struggle with signal degradation and noise interference.

    Purpose of the Study:

    • To develop and evaluate an imager with enhanced noise tolerance for imaging through strongly scattering media.
    • To demonstrate the superior performance of an upconversion single-photon detector compared to a near-infrared detector in noisy conditions.

    Main Methods:

    • An imager utilizing an upconversion single-photon detector was designed and implemented.
    • Experimental comparison between the upconversion detector and a near-infrared detector was conducted.
    • Imaging quality was assessed under varying integration times, noise intensities, and object surface types.

    Main Results:

    • The upconversion detector demonstrated superior noise tolerance and robustness in high-noise environments.
    • Clear images were obtained through scattering media with optical thickness up to 12ls.
    • The system achieved a signal-to-noise ratio of 1/400, outperforming the near-infrared detector.

    Conclusions:

    • Upconversion single-photon detectors offer a promising solution for challenging imaging applications.
    • The developed imager provides a significant advancement in obtaining high-quality images in noisy, scattering environments.