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Overcoming the influence of rayleigh backscattering in a coherent communication system

: Hilbk, U.; Hermes, T.H.; Meissner, P.; Westphal, F.-J.

European Institute for Communications and Networks, Geneve:
European optical communications and networks 1993. Proceedings. Papers on fibre optic communications : Eleventh Annual Conference on European Fibre Optic Communications and Networks, The Hague, June 30 - July 2, 1993
Basel: Verl. AKM, 1993
ISBN: 3-905084-15-5
Conference on European Fibre Optic Communications and Networks (EFOC&N) <11, 1993, s'Gravenhage>
Fraunhofer HHI ()
backscatter; light scattering; optical communication equipment; optical couplers; optical links; rayleigh scattering; subscriber loops; rayleigh backscattering; coherent communication system; internally bypassed star couplers; bidirectional coherent communication; subscriber line

Internally bypassed star couplers allow bidirectional coherent communication at the same frequency via one subscriber line. For longer subscriber Lines Rayleigh backscattering becomes a serious limiting factor which can be overcome by distributing the star.