Coexistence of 11.2Tb/s Carrier-Grade Classical Channels and a DV-QKD Channel over a 7-Core Multicore Fibre

TL;DR

This paper demonstrates the successful coexistence of high-capacity classical data channels and a quantum key distribution channel over a multicore fiber, showing potential for secure high-speed communications.

Contribution

It presents the first experimental demonstration of coexistence of 11.2 Tb/s classical channels with a DV-QKD channel over a multicore fiber.

Findings

Continuous secret key generation confirmed

Classical channels operate below the SDFEC limit

Quantum channel spacing of 17nm in the C-band

Abstract

We successfully demonstrate coexistence of record-high 11.2 Tb/s (56x200Gb/s) classical channels with a discrete-variable-QKD channel over a multicore fibre. Continuous secret key generation is confirmed together with classical channel performance below the SDFEC limit and a minimum quantum channel spacing of 17nm in the C-band.