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.
© 2004 Optical Society of America
(040.3060) Detectors : Infrared
(130.3120) Integrated optics : Integrated optics devices
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.7220) Nonlinear optics : Upconversion
(270.5570) Quantum optics : Quantum detectors
Rostislav V. Roussev, Carsten Langrock, Jonathan R. Kurz, and M. M. Fejer, "Periodically poled lithium niobate waveguide sum-frequency generator for efficient single-photon detection at communication wavelengths," Opt. Lett. 29, 1518-1520 (2004)