Title :
Bragg grating optical time domain reflectrometry using fast GaAs switches as a demultiplexing system
Author :
Kemp, J. ; Ning, Y.N. ; Carty, F. ; Palmer, A.W. ; Grattan, K.T.V. ; Meldrum, A. ; Li, L.
Author_Institution :
Dept. of Electr. Electron. & Inf. Eng., City Univ., London, UK
Abstract :
A fibre Bragg grating sensor system capable of demultiplexing eight gratings with a spatial resolution of less than 3 m has been shown. Using an interferometric phase shift analysis a higher sensitivity is possible compared with some WDM approaches. The system is expandable to accommodate a larger number of grating and improved spatial resolutions should be possible
Keywords :
fibre optic sensors; GaAs; WDM; binary tree arrangement; demultiplexing system; fast GaAs MMIC switches; fibre Bragg grating sensor system; high sensitivity; interferometric phase shift analysis; modulated unbalanced interferometer; optical path difference; optical time domain reflectrometry; phase modulation; sine wave reconstruction; spatial resolution; strain sensors;
Conference_Titel :
Optical Fibre Gratings (Digest No. 1997/037), IEE Colloquium on
Conference_Location :
London
DOI :
10.1049/ic:19970241
