2008/10/06 by A. R. Dixon, Z. L. Yuan, Zhiliang Yuan +3 · 1 citation
Computer Science · Physics and Astronomy · #Advanced Optical Sensing Technologies #Quantum Information and Cryptography #Quantum optics and atomic interactions #quant-ph
paper · pdf · doi:10.1364/oe.16.018790
published as Optics Express 16, 18790 (2008). · 14 pages, 3 figures
arxiv created 2008/10/06 · openalex publication_date 2008/10/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report the first gigahertz clocked decoy-protocol quantum key distribution (QKD). Record key rates have been achieved thanks to the use of self-differencing InGaAs avalanche photodiodes designed specifically for high speed single photon detection. The system is characterized with a secure key rate of 1.02 Mbit/s for a fiber distance of 20 km and 10.1 kbit/s for 100 km. As the present advance relies upon compact non-cryogenic detectors, it opens the door towards practical and low cost QKD systems to secure broadband communication in future.