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  • Title: Periodically poled lithium niobate waveguide sum-frequency generator for efficient single-photon detection at communication wavelengths.
    Author: Roussev RV, Langrock C, Kurz JR, Fejer MM.
    Journal: Opt Lett; 2004 Jul 01; 29(13):1518-20. PubMed ID: 15259732.
    Abstract:
    We present a device to facilitate single-photon detection at communication wavelengths based on continuous-wave sum-frequency generation with an upconversion efficiency exceeding 90%. Sum-frequency generation in a periodically poled lithium niobate waveguide is used to upconvert signal photons to the near infrared, where detection can be performed efficiently by use of silicon avalanche photodiodes.
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