Gigahertz-clocked quantum key distribution in passive optical networks

Veronica Fernandez, Robert J. Collins, Karen J. Gordon, Paul D. Townsend, Gerald S. Buller

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


In this paper we demonstrate the application of multi-user quantum key distribution (QKD) to typical broadband fibre-based passive optical access links to metropolitan area networks. We propose a technique to utilize the currently unused 850nm waveband in standard telecommunications fiber for QKD in two network architectures. Net bit rates of up to 100's of kilobits-1 were achieved for each receiver, depending on the network topology. The transmission distances between sender and receivers were compatible with the typical span of optical access links (= 10km).

Original languageEnglish
Title of host publicationQuantum Communications Realized
Publication statusPublished - 2007
EventQuantum Communications Realized - Boston, MA, United States
Duration: 10 Sep 200712 Sep 2007


ConferenceQuantum Communications Realized
Country/TerritoryUnited States
CityBoston, MA


  • Access networks
  • Cryptography
  • Encryption
  • Optical fiber
  • Quantum key distribution


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