We compare the performance of various quantum key distribution (QKD) systems using a novel single-photon detector, which combines frequency up-conversion in a periodically poled lithium niobate (PPLN) waveguide and a silicon avalanche photodiode (APD). The comparison is based on the secure communication rate as a function of distance for three QKD protocols: the Bennett-Brassard 1984 (BB84), the Bennett, Brassard, and Mermin 1992 (BBM92), and the coherent differential phase shift keying (DPSK). We show that the up-conversion detector allows for higher communication rates and longer communication distances than the commonly used InGaAs/InP APD for all the three QKD protocols.
@article{arxiv.quant-ph/0506036,
title = {Performance of various quantum key distribution systems using 1.55 um up-conversion single-photon detectors},
author = {Eleni Diamanti and Hiroki Takesue and Toshimori Honjo and Kyo Inoue and Yoshihisa Yamamoto},
journal= {arXiv preprint arXiv:quant-ph/0506036},
year = {2015}
}