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Browse Prior Art Database

Quantum key distribution with 1.25 Gbps clock synchronization

IP.com Disclosure Number: IPCOM000125641D
Original Publication Date: 2004-May-03
Included in the Prior Art Database: 2005-Jun-09
Document File: 6 page(s) / 96K

Publishing Venue

National Institute of Standards and Technology

Related People

Joshua C. Bienfang: INVENTOR [+12]

Abstract

We have demonstrated the exchange of sifted quantum cryptographic key over a 730 meter free-space link at rates of up to 1.0 Mbps, two orders of magnitude faster than previously reported results. A classical channel at 1550 nm operates in parallel with a quantum channel at 845 nm. Clock recovery techniques on the classical channel at 1.25 Gbps enable quantum transmission at up to the clock rate. System performance is currently limited by the timing resolution of our silicon avalanche photodiode detectors. With improved detector resolution, our technique will yield another order of magnitude increase in performance, with existing technology.

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Quantum key distribution with 1.25 Gbps clock synchronization

J. C. Bienfang, A. J. Gross, A. Mink, B. J. Hershman, A. Nakassis, X. Tang, R. Lu, D. H. Su, Charles W. Clark, Carl J. Williams

National Institute of Standards and Technology, 100 Bureau Dr.,Gaithersburg, MD 20899 bienfang@nist.gov

E. W. Hagley, Jesse Wen

Acadia Optronics LLC, 13401 Valley Drive, Rockville, MD 20850

Abstract: We have demonstrated the exchange of sifted quantum cryptographic key over a 730 meter free-space link at rates of up to 1.0 Mbps, two orders of magnitude faster than previously reported results. A classical channel at 1550 nm operates in parallel with a quantum channel at 845 nm. Clock recovery techniques on the classical channel at 1.25 Gbps enable quantum transmission at up to the clock rate. System performance is currently limited by the timing resolution of our silicon avalanche photodiode detectors. With improved detector resolution, our technique will yield another order of magnitude increase in performance, with existing technology.

2004 Optical Society of America

OCIS codes: (060.4510) Optical communications; (030.5260) Photon counting; (200.2610) Free-space digital optics; (270.5570) Quantum detectors

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References and links

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