Quantum key distribution over 30 km of standard fiber using energy-time entangled photon pairs: a comparison of two chromatic dispersion reduction methods

  • S. Fasel
  • N. GisinEmail author
  • G. Ribordy
  • H. Zbinden


We present a full implementation of a quantum key distribution system using energy-time entangled photon pairs over a 30 km standard telecom fiber quantum channel. Two bases of two orthogonal states are implemented and the set-up is shown to be robust to environmental constraints such as temperature variation. Two different ways to manage chromatic dispersion in the quantum channel are discussed.


Temperature Variation Distribution System Reduction Method Quantum Channel Orthogonal State 
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© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  1. 1.Group of Applied PhysicsUniversity of GenevaGeneva 4Switzerland

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