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Related Experiment Video

Updated: Mar 13, 2026

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Ultra-high bandwidth quantum secured data transmission.

James F Dynes¹, Winci W-S Tam¹, Alan Plews¹

¹Toshiba Research Europe Ltd, 208 Cambridge Science Park, Cambridge CB4 0GZ, UK.

Scientific Reports

|October 14, 2016

Summary

This summary is machine-generated.

Quantum key distribution (QKD) now coexists with high-speed data on the same fiber. This breakthrough enables secure optical networks with unprecedented bandwidth, paving the way for widespread quantum technology adoption.

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Last Updated: Mar 13, 2026

Quasi-light Storage for Optical Data Packets

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Published on: February 6, 2014

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Published on: September 8, 2023

Generation and Coherent Control of Pulsed Quantum Frequency Combs

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Published on: June 8, 2018

Area of Science:

Quantum Information Science
Optical Communications
Network Security

Background:

Quantum key distribution (QKD) offers secure communication but requires dedicated fibers, limiting its deployment.
Coexistence of QKD with conventional data traffic has been restricted to significantly lower bandwidths.

Purpose of the Study:

To demonstrate the simultaneous transmission of QKD and high-speed data over a single optical fiber.
To overcome the bandwidth limitations hindering QKD integration into existing communication infrastructures.

Main Methods:

Utilized an optimized wavelength division multiplexing (WDM) scheme for signal segregation.
Transported QKD and 100 Gb/s data formats in the forward direction over the same fiber.
Investigated Raman noise to determine the ultimate limits of combined data and QKD transmission.

Main Results:

Successfully demonstrated a full quantum encryption system with 200 Gb/s total bandwidth over a 100 km fiber.
Showcased the feasibility of combining QKD with 10 Tb/s data over a 50 km link by analyzing Raman noise.

Conclusions:

Integration of QKD with high-bandwidth data communication infrastructures is feasible.
This advancement facilitates the widespread deployment of QKD and other quantum photonic technologies.
Overcoming fiber segregation challenges unlocks new possibilities for secure optical networks.