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Quantum key distribution at GHz transmission rates



Alessandro Restelli, Joshua C. Bienfang, Alan Mink, Charles W. Clark


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 Title
SPIE Photonics West 2009
OPTO: Integrated Optoelectronic Devices

Conference Dates
January 19-24, 2009
Conference Location
San Jose, CA


free-space optical communication, quantum key distribution, single-photon


Restelli, A. , Bienfang, J. , Mink, A. and Clark, C. (2008), Quantum key distribution at GHz transmission rates, SPIE Photonics West 2009 OPTO: Integrated Optoelectronic Devices , San Jose, CA, [online], (Accessed April 23, 2024)
Created February 11, 2008, Updated February 19, 2017