Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Free-space quantum cryptography in the H-alpha Fraunhofer window

[+] Author Affiliations
D. J. Rogers

Univ. of Maryland, College Park and National Institute of Standards and Technology

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

National Institute of Standards and Technology

Proc. SPIE 6304, Free-Space Laser Communications VI, 630417 (September 01, 2006); doi:10.1117/12.680899
Text Size: A A A
From Conference Volume 6304

  • Free-Space Laser Communications VI
  • San Diego, California, USA | August 13, 2006

abstract

Free-space Quantum key distribution (QKD) has shown the potential for the practical production of cryptographic key for ultra-secure communications. The performance of any QKD system is ultimately limited by the signal to noise ratio on the single-photon channel, and over most useful communications links the resulting key rates are impractical for performing continuous one-time-pad encryption of today's broadband communications. We have adapted clock and data recovery techniques from modern telecommunications practice, combined with a synchronous classical free-space optical communications link operating in parallel, to increase the repetition rate of a free-space QKD system by roughly 2 orders of magnitude over previous demonstrations. We have also designed the system to operate in the H-alpha Fraunhofer window at 656.28 nm, where the solar background is reduced by roughly 7 dB. This system takes advantage of high efficiency silicon single-photon avalanche photodiodes with <50ps timing resolution that are expected to enable operation at a repetition rate of 2.5 GHz. We have identified scalable solutions for delivering sustained one-time-pad encryption at 10 Mbps, thus making it possible to integrate quantum cryptography into first-generation Ethernet protocols.

© (2006) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

D. J. Rogers ; J. C. Bienfang ; A. Mink ; B. J. Hershman ; A. Nakassis, et al.
"Free-space quantum cryptography in the H-alpha Fraunhofer window", Proc. SPIE 6304, Free-Space Laser Communications VI, 630417 (September 01, 2006); doi:10.1117/12.680899; http://dx.doi.org/10.1117/12.680899


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.