Compact transmission system using single-sideband modulation of light for quantum cryptography
Laurent Duraffourg, Jean-Marc Mérolla, Jean-Pierre Goedgebuer, Yuri T. Mazurenko, William T. Rhodes · Optics Letters · 2001
We report a new transmission that can be used for quantum key distribution. The system uses single-sideband-modulated light in an implementation of the BB84 quantum cryptography protocol. The system is formed by two integrated unbalanced Mach-Zehnder interferometers and is based on interference between phase-modulated sidebands in the spectral domain. Experiments show that high interference visibility can be obtained.