Ultra-high bandwidth quantum secured data transmission

Abstract

Quantum key distribution (QKD) provides an attractive means for securing communications in optical fibre networks. However, deployment of the technology has been hampered by the frequent need for dedicated dark fibres to segregate the very weak quantum signals from conventional traffic. Up until now the coexistence of QKD with data has been limited to bandwidths that are orders of magnitude below those commonly employed in fibre optic communication networks. Using an optimised wavelength divisional multiplexing scheme, we transport QKD and the prevalent 100 Gb/s data format in the forward direction over the same fibre for the first time. We show a full quantum encryption system operating with a bandwidth of 200 Gb/s over a 100 km fibre. Exploring the ultimate limits of the technology by experimental measurements of the Raman noise, we demonstrate it is feasible to combine QKD with 10 Tb/s of data over a 50 km link. These results suggest it will be possible to integrate QKD and other quantum photonic technologies into high bandwidth data communication infrastructures, thereby allowing their widespread deployment.

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• Quantum key distribution for 10 Gb/s dense wavelength division multiplexing networks
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Cited by in corpus (38)

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• Long-distance quantum key distribution secure against coherent attacks
• Broadband on-chip single-photon spectrometer
• Simple 2.5 GHz time-bin quantum key distribution
• Boosting the secret key rate in a shared quantum and classical fibre communication system
• Fast and simple qubit-based synchronization for quantum key distribution
• Demonstration of 17λ x 10 Gb/s C-Band Classical / DV-QKD Co-Existence Over Hollow-Core Fiber Link
• Quantum teleportation coexisting with classical communications in optical fiber
• Designing Noise-Robust Quantum Networks Coexisting in the Classical Fiber Infrastructure
• Intercore spontaneous Raman scattering impact on quantum key distribution in multicore fber
• Integration of quantum key distribution and gigabit-capable passive optical network based on wavelength-division multiplexing
• Long-term transmission of entangled photons from single quantum dot over deployed fiber
• Hacking single-photon avalanche detector in quantum key distribution via pulse illumination
• Information processing at the speed of light
• Experimental demonstration of the DPTS QKD protocol over a 170 km fiber link
• The limits of multiplexing quantum and classical channels: Case study of a 2.5 GHz discrete variable quantum key distribution system
• Noise-suppressing channel allocation in dynamic DWDM-QKD networks using LightGBM
• Recent advances on quantum key distribution overcoming the linear secret key capacity bound
• Synchronization of quantum communication over an optical classical communication channel
• Intensity modulation as a preemptive measure against blinding of single-photon detectors based on self-differencing cancellation
• Paving the Way towards 800 Gbps Quantum-Secured Optical Channel Deployment in Mission-Critical Environments
• Wavelength- and time-division multiplexing via pump current variation of a pulsed semiconductor laser -- a method of synchronization for quantum key distribution
• Clock offset recovery with sublinear complexity enables synchronization on low-level hardware for quantum key distribution
• Performance of the subcarrier-wave quantum key distribution in the presence of spontaneous Raman scattering noise generated by classical DWDM channels
• Technology Trends for Mixed QKD/WDM Transmission up to 80 km
• Universal random codes: Capacity regions of the compound quantum multiple-access channel with one classical and one quantum sender
• Optical transmitter for time-bin encoding Quantum Key Distribution
• A theoretical study of subcarrier-wave quantum key distribution system integration with an optical transport network utilizing dense wavelength division multiplexing
• Quantum entanglement distribution coexisting with high-rate, broadband classical optical communications over a real-world fiber connecting remote, synchronized nodes
• Optimal filtering and generation of entangled photons for quantum applications in the presence of noise
• DV-QKD Coexistence With 1.6 Tbps Classical Channels Over Hollow Core Fibre
• Quantum Key Distribution: Bridging Theoretical Security Proofs, Practical Attacks, and Error Correction for Quantum-Augmented Networks
• Qubit-based clock synchronization for QKD systems using a Bayesian approach