Performance of various quantum key distribution systems using 1.55 um up-conversion single-photon detectors

摘要

We compare the performance of various quantum key distribution (QKD) systemsusing a novel single-photon detector, which combines frequency up-conversion ina periodically poled lithium niobate (PPLN) waveguide and a silicon avalanchephotodiode (APD). The comparison is based on the secure communication rate as afunction of distance for three QKD protocols: the Bennett-Brassard 1984 (BB84),the Bennett, Brassard, and Mermin 1992 (BBM92), and the coherent differentialphase shift keying (DPSK). We show that the up-conversion detector allows forhigher communication rates and longer communication distances than the commonlyused InGaAs/InP APD for all the three QKD protocols.