Phase Polarization Multi-Degree of Freedom Modulation Quantum Key Distribution Network Systems and Methods

摘要

The present invention relates to a phase-polarized multi-degree-of-freedom modulated quantum key distribution (QKD) network system and method, comprising an Alice transmission end, a wavelength division multiplexing (WDM) Wherein the Alice stage comprises a multi-wavelength laser generator, an attenuator, a first polarization beam splitter, a first beam combiner, a phase modulator, first and second polarization controllers, Wherein the wavelength division multiplexing unit comprises a wavelength selection device, the multi-user Bob stage comprising several unit Bob client stages for receiving different frequency bands, wherein each of the unit Bob client stages comprises a second, Third and fourth polarization beam splitters, second and third beam combiners, and first through fourth photon detectors. The QKD network system used in the present invention is capable of realizing one-to-many quantum key sharing, effectively expanding the information transmission capacity, applying the phase-polarized multi-degree of freedom modulation QKD scheme and other QKD schemes.