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Long-wavelength-pumped single-photon detector based on frequency up-conversion in MgO-doped periodically-poled LiNbO3 waveguide reaching ultralow dark count rates

Da Li, Guan Sun, Yujie J. Ding, Narasimha S. Prasad

Published Jan 1, 2013• 0 citations
Publisher

Abstract

We implemented single-photon detector in 1500-nm band based on frequency up-conversion in nonlinear waveguide at pump wavelength of 1920 nm. Ultralow dark count rate and signal photon detection rate are 20 s−1 and 56.8 s−1.
DOI
10.1364/cleo_si.2013.cm4d.2

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We demonstrate upconversion-assisted single-photon detection for the 1.55-μm telecommunications band based on a periodically poled lithium niobate (PPLN) waveguide pumped by a monolithic PPLN optical parametric oscillator. We achieve an internal conversion efficiency of 86%, which results in an overall system detection efficiency of 37%, with excess noise as low as 10(3) counts s(-1). We measure the dark count rate versus the upconversion pump-signal frequency separation and find the results to be consistent with noise photon generation by spontaneous anti-Stokes Raman scattering. These results enable detailed design guidelines for the development of low-noise quantum frequency conversion systems, which will be an important component of fiber-optic quantum networks.