Experimental Demonstration of a Detection-Time-Bin-Shift Polarization Encoding Quantum Key Distribution System

Experimental Demonstration of a Detection-Time-Bin-Shift Polarization Encoding Quantum Key Distribution System

Detection-time-bin-shift (DTBS) is a scheme that uses time division multiplexing of a single photon detector between two photon bases in a quantum key distribution (QKD) system. This scheme can simplify the structure of a QKD system, reduce its cost and overcome the security problems caused by the d...

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Veröffentlicht in:IEEE communications letters 2008-06, Vol.12 (6), p.459-461
Hauptverfasser: Lijun Ma, Tiejun Chang, Mink, A., Slattery, O., Hershman, B., Xiao Tang
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Bit error rate
Classical and quantum physics: mechanics and fields
Coding, codes
Cost engineering
Costs
Cryptography
Detectors
Encoding
Exact sciences and technology
Information, signal and communications theory
Keys
Multiplexing
NIST
Optical coupling
Optical fiber couplers
Optical fiber polarization
Photons
Physics
Polarization
Protocols
Quantum cryptography
Quantum information
Security
Signal and communications theory
Telecommunications and information theory
Time division multiplexing
Vertical cavity surface emitting lasers
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Zusammenfassung:Detection-time-bin-shift (DTBS) is a scheme that uses time division multiplexing of a single photon detector between two photon bases in a quantum key distribution (QKD) system. This scheme can simplify the structure of a QKD system, reduce its cost and overcome the security problems caused by the dead-time induced self-correlation and the unbalanced characteristics of detectors. In this paper, we introduce an improved DTBS scheme and implement it based on our previously developed conventional fiber-based QKD system using the B92 protocol. Our DTBS QKD system generates sifted keys at a rate of more than 1 Mbit/s with a quantum bit error rate (QBER) lower than 2% over 1.1 km of fiber.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2008.080237