Title :
Point-to-point free-space quantum cryptography over 1/2 km
Author :
Buttler, W.T. ; Hughes, R.J. ; Kwiat, Paul G. ; Lamoreaux, S.K. ; Morgan, G.L. ; Nordholt, J.E. ; Peterson, C.G.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
Summary form only given. We have demonstrated a point-to-point single photon quantum cryptographic key distribution over a free-space optical path of /spl sim/475 m (>1,000 times farther than any reported point-to-point demonstration, and >6 times the previous daylight transmission distance), under both daylight and nighttime conditions. Within the next few months, we expect to extend the daylight range to 2 km. A brief description of the system is given here.
Keywords :
optical communication; optical receivers; optical transmitters; photon counting; quantum cryptography; 0.5 km; 475 m; daylight conditions; daylight transmission distance; free-space optical path; nighttime conditions; point-to-point free-space quantum cryptography; point-to-point single photon quantum cryptographic key distribution; Cryptography; Optical attenuators; Optical fiber polarization; Optical filters; Optical polarization; Optical pulses; Optical receivers; Optical retarders; Optical transmitters; Timing;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 1999. QELS '99. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-576-X
DOI :
10.1109/QELS.1999.807379
