DocumentCode
890466
Title
Single photon interference in 10 km long optical fibre interferometer
Author
Townsend, Paul D. ; Rarity, J.G. ; Tapster, P.R.
Author_Institution
BT Labs., Ipswich, UK
Volume
29
Issue
7
fYear
1993
fDate
4/1/1993 12:00:00 AM
Firstpage
634
Lastpage
635
Abstract
Single-photon interference fringes with greater than 90% visibility were measured using a 10 km long optical fibre interferometer. The experiment employed a pulsed semiconductor laser source operating at a wavelength of 1.3 mu m and a novel single-photon counting scheme using high-speed germanium avalanche photodiodes. Interferometers of this type could form the basis of future quantum cryptography systems.
Keywords
avalanche photodiodes; cryptography; elemental semiconductors; germanium; light interferometers; optical communication; optical communication equipment; 1.3 micron; 10 km; APD; Ge avalanche photodiode; experiment; long optical fibre interferometer; pulsed semiconductor laser source; quantum cryptography systems; secret key transmission; semiconductors; single photon interference; single-photon counting scheme; wavelength;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19930424
Filename
211832
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