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1995-06-27 - Colloque/Article dans les actes avec comité de lecture - Anglais - 4 page(s)

Moeyaert Véronique , Jaunart Emmanuël, Blondel Michel, "Comparison of Return Loss MEasurements in Point-to-Point and Point-to-Multipoints Passive Optical Networks" in 13th Annual Conference on European Fibre Optica Communications and Networks (EFOC&N 1995), 196-199, Brighton, UK, 1995

  • Codes CREF : Optique des fibres (électromagnétisme) (DI1252), Technologie des télécommunications [transmission] (DI2556)
  • Unités de recherche UMONS : Electromagnétisme et Télécommunications (F108)
  • Instituts UMONS : Institut de Recherche en Technologies de l’Information et Sciences de l’Informatique (InforTech)
  • Centres UMONS : Technologie Information et Communication (TIC)

Abstract(s) :

(Anglais) For ages, optical networks were point-to-point shaped. Different methods of attenuation and Optical Return Loss (ORL) measurements, namely OCWR (Optical Continuous Wave Reflectometre) and OTDR (Optical Time Domain Reflectometre), were developed to characterise their performances. Nowadays, there are more and more field and laboratory trials using optical splitters in order to build point-to-multipoints shaped optical networks, as Passive Optical Networks (PON) and Passive Double Star (PDS) networks. New theories of attenuation and ORL measurements had to be developed to solve a major problem in OTDR measurements : the superposition of optical power backscattering from all branches of the networks. The aim of this paper is to clarify and compare the actual situation in ORL measurements using different methods. It will first compare results from discrete components (connectors, splitters) measurements in point-to-point networks by OCWR and OTDR techniques. After a brief description of existing theories in ORL measurements for point-to-multipoints networks, this paper will then compare the ORL values of the same discrete components for such a kind of network.