# 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.

## Key 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.

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Source: https://tomesphere.com/paper/1907.01459