Numerical simulation of quantum key distribution network based on wavelength division multiplexing technology

Wavelength division multiplexing (WDM) technology can improve the networking level and overcome the shortcomings of low key rate under the existing technic background of measurement device independent quantum key distribution (MDI-QKD) protocol application. reference frame independent quantum key distribution (RFI-MDI-QKD) protocol cut down on the influence of the reference frame drift on the key distribution system. The decoy state protocol has important development prospects in the development of quantum communication networking. Combining the advantages of of the above protocols to realize RFI-MDI-QKD with WDM, the results show that the key distribution efficiency is improved with the increase in the number of WDM multiplexed channels, which promotes the further exploration and achievement of QKD networking application.