InGaAs/InP single-photon avalanche diodes (SPADs) working in the regime of GHz clock rates are crucial components for the high-speed quantum key distribution (QKD). We have developed for the first time a compact, stable and user-friendly tabletop InGaAs/InP single-photon detector system operating at a 1.25 GHz gate rate that fully integrates functions for controlling and optimizing SPAD performance. We characterize the key parameters of the detector system and test the long-term stability of the system for continuous operation of 75 hours. The detector system can substantially enhance QKD performance and our present work paves the way for practical high-speed QKD applications.
@article{arxiv.1208.0127,
title = {Fully integrated InGaAs/InP single-photon detector module with gigahertz sine wave gating},
author = {Xiao-Lei Liang and Jian-Hong Liu and Quan Wang and De-Bing Du and Jian Ma and Ge Jin and Zeng-Bing Chen and Jun Zhang and Jian-Wei Pan},
journal= {arXiv preprint arXiv:1208.0127},
year = {2015}
}
Comments
11 pages, 6 figures. Accepted for publication in Review of Scientific Instruments