Coexistence of Entanglement-based Quantum Channels with DWDM Classical Channels over Hollow Core Fibre in a Four Node Quantum Communication Network

Abstract

We experimentally demonstrate the coexistence of three entanglement-based quantum channels with carrier-grade classical optical channels over $11.5$km hollow core nested antiresonant nodeless fibre, in a four user quantum network. A transmission of $800$Gbps is achieved with four classical channels simultaneously with three quantum channels all operating in the C-band with a separation of $1.2$nm, with aggregated coexistence power of $-3$dBm. We established quantum key distribution in the four-node full-mesh quantum network with Bell state fidelity of up to $90.0\pm 0.8$%. The secret key rate for all the links in the network are passively preserved over $55$hours of experimental time.

14 pages, 6 figures, 4 tables

References in corpus (3)

• Impact of Raman scattered noise from multiple telecom channels on fiber-optic quantum key distribution systems
• Demonstration of 17λ x 10 Gb/s C-Band Classical / DV-QKD Co-Existence Over Hollow-Core Fiber Link
• Distribution of Telecom Entangled Photons through a 7.7 km Antiresonant Hollow-Core Fiber