Practical point-to-point free-space quantum key distribution over .5 km

William T. Buttler; Richard J. Hughes; Paul G. Kwiat; Steve K. Lamoreaux; George L. Morgan; Jane E. Nordholt; C. Glen Peterson

doi:10.1117/12.354778

19 July 1999 Practical point-to-point free-space quantum key distribution over .5 km

William T. Buttler, Richard J. Hughes, Paul G. Kwiat, Steve K. Lamoreaux, George L. Morgan, Jane E. Nordholt, C. Glen Peterson

Author Affiliations +

Proceedings Volume 3749, 18th Congress of the International Commission for Optics; (1999) https://doi.org/10.1117/12.354778
Event: ICO XVIII 18th Congress of the International Commission for Optics, 1999, San Francisco, CA, United States

Abstract

We have demonstrated point-to-point single-photon quantum key distribution over a free-space optical path of approximately 475 m under daylight conditions. This represents an increase of > 1,000 times farther than any reported point-to-point demonstration, and > 6 times farther than the previous folded path daylight demonstration. We expect to extend the daylight range to 2 km or more within the next few months. A brief description of the system is given here.

Citation Download Citation

William T. Buttler, Richard J. Hughes, Paul G. Kwiat, Steve K. Lamoreaux, George L. Morgan, Jane E. Nordholt, and C. Glen Peterson "Practical point-to-point free-space quantum key distribution over .5 km", Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); https://doi.org/10.1117/12.354778

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