Gigahertz quantum key distribution with InGaAs avalanche photodiodes

Abstract

We report a demonstration of quantum key distribution (QKD) at GHz clock rates with InGaAs avalanche photodiodes (APDs) operating in a self-differencing mode. Such a mode of operation allows detection of extremely weak avalanches so that the detector afterpulse noise is sufficiently suppressed. The system is characterized by a secure bit rate of 2.37 Mbps at 5.6 km and 27.9 kbps at 65.5 km when the fiber dispersion is not compensated. After compensating the fiber dispersion, the QKD distance is extended to 101 km, resulting in a secure key rate of 2.88 kbps. Our results suggest that InGaAs APDs are very well suited to GHz QKD applications.

arXiv comment4 pages, 4 figures

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Cited by in corpus (31)

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• Making the decoy-state measurement-device-independent quantum key distribution practically useful
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• Field test of a continuous-variable quantum key distribution prototype
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• Field test of a practical secure communication network with decoy-state quantum cryptography
• Practical gigahertz quantum key distribution robust against channel disturbance
• Practical fast gate rate InGaAs/InP single-photon avalanche photodiodes
• Effect of source tampering in the security of quantum cryptography
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• Hacking the quantum key distribution system by exploiting the avalanche transition region of single photon detectors
• Fully integrated InGaAs/InP single-photon detector module with gigahertz sine wave gating
• Hacking on decoy-state quantum key distribution system with partial phase randomization
• Experimental asymmetric Plug-and-Play Measurement-device-independent quantum key distribution
• Real-time characterization of gated-mode single-photon detectors
• 1GHz clocked distribution of electrically generated entangled photon pairs
• Strong pulse illumination hacks self-differencing avalanche photodiode detectors in a high-speed quantum key distribution system
• Few-mode-fiber technology fine-tunes losses of quantum communication systems
• Experimental Demonstration of Passive-Decoy-State Quantum-Key-Distribution with Two Independent Lasers
• Free-Space Quantum Key Distribution
• Detector of microwave photon pairs based on a Josephson photomultiplier
• Hybrid-Integrated InGaAs/InP SPAD Arrays for Quantum Communications
• Low-dimensional platforms for single photon detection