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.
Published in:
Electronics Letters
(Volume:29
,
Issue:
14
)
Date of Publication: 8 July 1993