Passive optical network approach to gigahertz-clocked multiuser quantum key distribution

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

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)


We present the application of quantum key distribution (QKD) technologies to fiber-based broad-band passive optical access networks. This application is based on our 850-nm wavelength gigahertz clock-rate single-receiver system, is compatible with existing telecommunications fiber and exploits a wavelength band not currently utilized in access networks. The developed QKD networks are capable of transmitting over distances consistent with the span of access links for metropolitan networks (10 km), at clock frequencies ranging up to 3 GHz. © 2007 IEEE.

Original languageEnglish
Pages (from-to)130-138
Number of pages9
JournalIEEE Journal of Quantum Electronics
Issue number2
Publication statusPublished - Feb 2007


  • Communications systems
  • Cryptography
  • Data security
  • Optical fiber communications
  • Quantum cryptography
  • Quantum key distribution (QKD)


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