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Proceedings Paper

Truly distributed strain and temperature sensing using embedded optical fibers
Author(s): Luc Thevenaz; Marc Nikles; Alexandre Fellay; Massimo Facchini; Philippe A. Robert
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Paper Abstract

Long-range distributed strain and temperature measurements along an optical fiber is presented, using a novel optical sensor based on stimulated Brillouin scattering. The optical effect only depends on the fiber material, so that the bare fiber itself acts as sensing element without any special fiber processing or preparation. The sensor accuracy is +/- 1 degree C for temperature and +/- 20 (mu) e for deformation. The spatial resolution is 1 meter and the sensor range is more than 20 km. Successful monitoring of a concrete dam element has been performed using an embedded standard cabled fiber. The temperature dynamics of lake waters have been also observed by simply laying a cable over the lake bed.

Paper Details

Date Published: 21 July 1998
PDF: 14 pages
Proc. SPIE 3330, Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (21 July 1998); doi: 10.1117/12.316986
Show Author Affiliations
Luc Thevenaz, Swiss Federal Institute of Technology (Switzerland)
Marc Nikles, Swiss Federal Institute of Technology (Switzerland)
Alexandre Fellay, Swiss Federal Institute of Technology (Switzerland)
Massimo Facchini, Swiss Federal Institute of Technology (Switzerland)
Philippe A. Robert, Swiss Federal Institute of Technology (Switzerland)


Published in SPIE Proceedings Vol. 3330:
Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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