1.6 Tbps Classical Channel Coexistence With DV-QKD Over Hollow Core Nested Antiresonant Nodeless Fibre (HC-NANF)

TL;DR

This paper demonstrates the coexistence of a high-capacity classical optical channel with a quantum channel over hollow core fiber, highlighting advantages over traditional single-mode fiber in terms of quantum channel sustainability at high power levels.

Contribution

It is the first to show quantum and classical channel coexistence over HC-NANF at high power levels, with detailed comparative analysis against single-mode fiber.

Findings

Quantum channel cannot be sustained at high power in single-mode fiber.

Successful coexistence of quantum and classical channels over HC-NANF.

High data rate classical channels coexist with quantum channels in HC-NANF.

Abstract

We demonstrate for the first time the coexistence of a quantum-channel and 8x200 Gpbs 16-QAM optical channels with launching powers as high as -9dBm per channel in a 2 km HC-NANF. Comparative analysis with single-mode fibre reveals that the quantum channel could not be sustained at such power levels.