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Periodically poled lithium niobate waveguide sum-frequency generator for efficient single-photon detection at
Rostislav V Roussev1, Carsten Langrock, Jonathan R Kurz
1Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305-4085, USA. rrousev@stanford.edu
Optics Letters
|July 21, 2004
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.