COMBINING QKD AND CLASSICAL COMMUNICATION

摘要

There is herein disclosed a method of communication between a client pair, the client pair comprising an upstream client and a downstream client, the method being performed over a first optical fibre in an optical fibre pair, the method comprising: transmitting a downstream DWDM signal over the first optical fibre, wherein the downstream DWDM signal has a first frequency and contains first data originating from the upstream client, transmitting an upstream DWDM signal over the first optical fibre, wherein the upstream DWDM signal has a second frequency and contains second data originating from the downstream client, wherein the first frequency is different to the second frequency, and performing Quantum Key Distribution over the second optical fibre of the optical fibre pair.