Quantum entanglement distribution with 810 nm photons through telecom fibers

E. Meyer-Scott, H. Huebel, A. Fedrizzi, C. Erven, G. Weihs, T. Jennewein

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Abstract

We demonstrate the distribution of polarization entangled photons of wavelength 810 nm through standard telecom fibers. This technique allows quantum communication protocols to be performed over established fiber infrastructure, and makes use of the smaller and better performing setups available around 800 nm, as compared to those which use telecom wavelengths around 1550 nm. We examine the excitation and subsequent quenching of higher-order spatial modes in telecom fibers up to 6 km in length, and perform a distribution of high quality entanglement (visibility 95.6%). Finally, we demonstrate quantum key distribution using entangled 810 nm photons over a 4.4 km long installed telecom fiber link. (C) 2010 American Institute of Physics. [doi:10.1063/1.3460920]

Original languageEnglish
Article number031117
Number of pages3
JournalApplied Physics Letters
Volume97
Issue number3
DOIs
Publication statusPublished - 19 Jul 2010

Keywords

  • optical fibre communication
  • protocols
  • quantum communication
  • quantum cryptography
  • quantum entanglement
  • radiation quenching
  • KEY DISTRIBUTION
  • CRYPTOGRAPHY

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