Quantum secured gigabit optical access networks

Understand

Optical access networks connect multiple endpoints to a common network node via shared fibre infrastructure.

• They will play a vital role to scale up the number of users in quantum key distribution (QKD) networks.
• However, the presence of power splitters in the commonly used passive network architecture makes successful transmission of weak quantum signals challenging.
• This is especially true if QKD and data signals are multiplexed in the passive network.