We report on a bright, nondegenerate type-I parametric down-conversion source, which is well suited for passive decoy-state quantum key distribution. We show the photon-number-resolved analysis over a broad range of pump powers and we prove heralded higher-order n-photon states up to n=4. The inferred photon click statistics exhibit excellent agreements to the theoretical predictions. From our measurement results we conclude that our source meets the requirements to avert photon-number-splitting attacks.
@article{arxiv.1401.7111,
title = {Bright Integrated Photon-Pair Source for Practical Passive Decoy-State Quantum Key Distribution},
author = {Stephan Krapick and Michael Stefszky and Michal Jachura and Benjamin Brecht and Malte Avenhaus and Christine Silberhorn},
journal= {arXiv preprint arXiv:1401.7111},
year = {2014}
}