Title :
Long-reach single-mode-fibre OTDR using a 1.5 μm semiconductor laser
Author :
Cottrell, E.A. ; Brain, M.C.
Author_Institution :
British Telecom Research Laboratories, Ipswich, UK
Abstract :
We report an OTDR operating at 1.535 μm wavelength, capable of fault location over 100 km of commercial single-mode fibre. Whereas the one-way loss range of an OTDR is conventionally quoted for a received signal/noise ratio of unity, we demonstrate that a margin of at least 3 dB should be allowed in deducing the realistic range of fibre loss over which faults could be located.
Keywords :
fault location; laser beam applications; optical communication equipment; optical losses; time-domain reflectometry; fault location; fibre loss; one-way loss range; optical time domain reflectometer; received signal/noise ratio; semiconductor laser; wavelength 1.535 microns;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19860303
