Title :
Asymmetric Mach-Zehnder germano-silicate channel waveguide interferometers for quantum cryptography systems
Author :
Bonfrate, G. ; Harlow, M. ; Ford, C. ; Maxwell, G. ; Townsend, P.D.
Author_Institution :
Corning Res. Centre, Ipswich, UK
fDate :
6/21/2001 12:00:00 AM
Abstract :
Asymmetric Mach-Zehnder channel waveguide interferometers possessing a 1.1 ns delay in one of the arms were fabricated using flame hydrolysis deposition of silica glass on silicon. Two modules were combined to form a single time-division interferometer for optical pulses. The composite interferometer exhibited a high fringe contrast ratio of 1:200 making it eminently suitable for use in compact, low error-rate quantum cryptography systems
Keywords :
Mach-Zehnder interferometers; chemical vapour deposition; germanate glasses; optical communication; optical fabrication; optical glass; optical waveguides; quantum cryptography; symmetry; 1.1 ns; asymmetric Mach-Zehnder germano-silicate channel waveguide interferometers; compact low error-rate quantum cryptography systems; composite interferometer; flame hydrolysis deposition; high fringe contrast ratio; ns delay; optical pulses; quantum cryptography systems; silica glass; single time-division interferometer;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010508
