A compact free space quantum key distribution system capable of daylight operation

David M. Benton, Philip M. Gorman, Paul R. Tapster, David M. Taylor

Research output: Contribution to journalArticle

Abstract

A free space quantum key distribution system has been demonstrated. Consideration has been given to factors such as field of view and spectral width, to cut down the deleterious effect from background light levels. Suitable optical sources such as lasers and RCLEDs have been investigated as well as optimal wavelength choices, always with a view to building a compact and robust system. The implementation of background reduction measures resulted in a system capable of operating in daylight conditions. An autonomous system was left running and generating shared key material continuously for over 7 days.
Original languageEnglish
Pages (from-to)2465-2471
Number of pages7
JournalOptics Communications
Volume283
Issue number11
DOIs
Publication statusPublished - 1 Jun 2010

Keywords

  • quantum cryptography
  • daylight
  • RCLED

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