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1.064-μm-band up-conversion single-photon detector.

Fei Ma, Ming-Yang Zheng, Quan Yao

    Optics Express
    |August 10, 2017
    PubMed
    Summary

    Researchers demonstrate efficient up-conversion single-photon detection at 1.064 μm using periodically poled lithium niobate waveguides. This technology achieves high detection efficiency with low noise, offering practical applications in various fields.

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    Area of Science:

    • Quantum optics
    • Photonics
    • Materials science

    Background:

    • Single-photon detectors are crucial for quantum information processing and sensitive measurements.
    • Up-conversion detection offers advantages for specific wavelength ranges, but challenges remain in efficiency and noise reduction.

    Purpose of the Study:

    • To demonstrate a practical and efficient up-conversion single-photon detector operating at 1.064 μm.
    • To explore the use of periodically poled lithium niobate (PPLN) waveguides for enhanced photon detection.

    Main Methods:

    • Utilized periodically poled lithium niobate (PPLN) waveguides for nonlinear frequency conversion.
    • Employed a 1.55-μm-band single-frequency laser for long-wavelength pumping.
    • Implemented a volume Bragg grating (VBG) as a narrow-band filter, and alternatively, dielectric filters.

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    Main Results:

    • Achieved a system photon detection efficiency of 32.5% with a low noise count rate of 45 counts per second using VBG filtering.
    • Attained up to 38% detection efficiency with a noise count rate of 700 counts per second using dielectric filters, ensuring system stability and practicality.

    Conclusions:

    • The developed up-conversion single-photon detector operating at 1.064 μm is a promising robust counter.
    • The PPLN waveguide technology offers a practical solution for high-performance single-photon detection in various applications.