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

fYear

1992

fDate

23-28 May 1992

Firstpage

112

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/QELS.1999.807379

Filename

807379