Abstract
A point-to-point single-photon quantum key distribution (QKD) over a free-space optical path of approximately 475 m through a turbulent medium under daylight conditions is demonstrated. This represents an increase of >1000 times farther than any reported point-to-point demonstration and >6 times farther than the previous folded path daylight demonstration. A passive QKD transmitter and receiver that provides a secure method to secretly communicate with a simple system based on the B92 protocol is described.
Original language | English (US) |
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Pages (from-to) | 344-345 |
Number of pages | 2 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 3749 |
State | Published - 1999 |
Externally published | Yes |
Event | Proceedings of the 1999 18th Congress of the International Commission for Optics (ICO XVIII): Optics for the Next Millennium - San Francisco, CA, USA Duration: Aug 2 1999 → Aug 6 1999 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering