Optical Time Domain Reflectometry Using the Heterodyne Principle

  • R. Knoechel
  • S. Heckmann
  • J. Rybach
  • E. Brinkmeyer
Conference paper


Optical time domain reflectometry (OTDR) is well established to measure the transmission characteristics (attenuation, splice loss, fault location) of optical-fibre communication channels. A short light-pulse (typical duration 1 µs) is launched into one end of the fibre and the resulting backscatter response is evaluated. Present OTDR-systems are mostly using direct-detection receivers.


Attenuation Coupler 


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Copyright information

© Springer-Verlag Berlin, Heidelberg 1986

Authors and Affiliations

  • R. Knoechel
    • 1
  • S. Heckmann
    • 2
  • J. Rybach
    • 2
  • E. Brinkmeyer
    • 3
  1. 1.Philips GmbH Forschungslaboratorium HamburgHamburg 54Germany
  2. 2.Geschäftsbereich N, Abteilung NMVF&G Nachrichtenkabel und -anlagenKöln 80Germany
  3. 3.Technische Universität Hamburg-HarburgHamburg 90Germany

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