Title :
Enhanced single photon fringe visibility in a 10 km-long prototype quantum cryptography channel
Author :
Townsend, Paul D. ; Rarity, J.G. ; Tapster, P.R.
Author_Institution :
BT Labs., Ipswich, UK
fDate :
7/8/1993 12:00:00 AM
Abstract :
High visibility (V=0.985) single photon fringe measurements in a 10 km long, optical fibre-based, time- and polarisation-division Mach-Zehnder interferometer are reported. The ability of the system to transmit key data in a quantum cryptography scheme is assessed.
Keywords :
cryptography; light interferometry; optical fibres; optical links; 10 km; Mach-Zehnder interferometer; key data transmission; optical fibre based system; polarisation-division; quantum cryptography channel; single photon fringe visibility; time division;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19930862
