Patent ID: 8320774
Filing Date: 2012-11-27
Classification: H04B,H04L

Abstract:
1. A tunable Quantum Cryptography (QC) apparatus for maximizing interference contrast in an interferometric quantum cryptography system, the tunable QC apparatus comprising: an emitter station in electronic communication with a first communications channel and a second communications channel, and at least one of the communications channel being a quantum communications channel, the emitter station including a tunable emitter unit adapted to maximize interference contrast in the QC apparatus by wavelength tuning an emitted light wavelength of an emitter tight source in response to interferometer drift, the tunable emitter unit comprising a laser diode module having a tunable laser diode as the source of emitted light; and a receiver station in operative electronic communications with the emitter station via the first and second communications channels, the combination providing the QC apparatus utilising emitted light wavelength tuning to maximize interference contrast.