Title :
Simple fibre-optic sensor for detecting water penetration into optical fibre cables
Author :
de Jongh, A.G.W.M. ; Diemeer, M.B.J. ; Trommel, E.S.d. ; Breuls, A.H.E.
Author_Institution :
PTT Dr. Neher Laboratories, Leidschendam, Netherlands
Abstract :
In this sensor concept a graded-index fibre is pressed on a periodic structure by a material that swells in water, causing microbending loss. Optimum values of the wavelength of the periodic structure are calculated and confirmed by measurements. The sensor can easily be integrated in an optical fibre cable; water penetration can then be localised by OTDR.
Keywords :
fibre optics; leak detection; nonelectric sensing devices; optical fibres; optical variables measurement; time-domain reflectometry; OTDR; fibre-optic sensor; graded-index fibre; microbending loss; optical fibre cables; optical time domain reflectometry; periodic structure; water penetration; wavelength;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19830666
