16/10/2021

Licensing Consultant

Not just any technology

A new type of air-filled fiber optic cable could offer major security benefits

BT promises to have reached a new milestone in the enhancement of quantum-protected communications by conducting the world’s first trial of Quantum Critical Distribution (QKD) more than a six-kilometer-very long cable of hollow core optical fiber

QKD is a protected communication protocol that leverages protection keys centered on the laws of physics relatively than mathematical complexity.

Explaining the significance of its trial, BT suggests that contrary to standard optical fiber that is made of solid strands of glass that ferry data by channeling gentle indicators emitted by laser transmitters, the new hollow core fiber is in truth filled with nothing but air that is encased in a ring of glass. 

BT argues that the hollow cables are better suited to the peculiarities of QKD, as it decreases the possibility of interference.

Protected quantum communication

Ferrying QKD indicators is a scorching topic of investigation. A pair of months back, Cambridge-centered researchers from Toshiba shared particulars about their challenge that productively ferried QKD indicators more than 600 kms

Toshiba argued that although existing commercial QKD programs are minimal to about a hundred-200 km of fiber, its dual band stabilization method will enable maintain the indicators more than hundreds of kilometers.

On the other hand, BT has taken a different technique by changing the standard optical cables with hollow kinds developed by Lumenisity Minimal, a spin-out from the University of Southampton.

BT argues that many thanks to Lumenisity’s hollow optical cables, commercial telecommunications gear never will need to be optimized in order to deliver a knowledge-encrypted important. 

“We’ve verified a vary of advantages that can be realized by deploying hollow core fiber for quantum-protected communication. Hollow core fiber’s lower latency and potential to deliver QKD more than a one fiber with other indicators is a essential improvement for the upcoming of protected communications,” mentioned Professor Andrew Lord, BT’s Head of Optical Network Exploration.