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

摘要

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.