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Publication Citation: Quantum key distribution at GHz transmission rates

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Author(s): Alessandro Restelli; Joshua C. Bienfang; Alan Mink; Charles W. Clark;
Title: Quantum key distribution at GHz transmission rates
Published: February 11, 2008
Abstract: Quantum key distribution (QKD) channels are typically realized by transmitting and detecting single photons, and therefore suffer from dramatic reductions in throughput due to both channel loss and noise. These shortcomings can be mitigated by applying telecommunications clock-recovery techniques to maximize the bandwidth of the single-photon channel and minimize the system s exposure to noise. We demonstrate a QKD system operating continuously at a quantum-channel transmission rate of 1.25 GHz, with dedicated data-handling hardware and error-correction/privacy amplification. We discuss the design and performance of our system and highlight issues which limit our maximum transmission and key production rates.
Proceedings: SPIE Photonics West 2009 OPTO: Integrated Optoelectronic Devices
Location: San Jose, CA
Dates: January 19-24, 2009
Keywords: free-space optical communication; quantum key distribution; single-photon
Research Areas: Atomic Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (1MB)