Title :
Interferometry with Faraday mirrors for quantum cryptography
Author :
Zbinden, H. ; Gautier, J.D. ; Gisin, N. ; Huttner, B. ; Muller, A. ; Tittel, W.
Author_Institution :
Group of Appl. Phys., Geneva Univ., Switzerland
fDate :
3/27/1997 12:00:00 AM
Abstract :
Quantum cryptography over 23 km of installed telecommunications fibre using a novel interferometer with Faraday mirrors is presented. The interferometer needs no alignment nor polarisation control and features 99.8% fringe visibility. A secret key of 20 kbit length with an error rate of 1.35% for 0.1 photon per pulse was produced
Keywords :
cryptography; light interferometry; light polarisation; optical fibres; 23 km; Faraday mirrors; error rate; fringe visibility; light interferometry; quantum cryptography; secret key; telecommunications fibre;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19970427
