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7 April 2008 A distributed fiber optic sensor system for dike monitoring using Brillouin optical frequency domain analysis
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Abstract
We report on the development of a complete system for spatially resolved detection of critical soil displacement in river embankments. The system uses Brillouin frequency domain analysis (BOFDA) for distributed measurement of strain in silica optical fibers. Our development consists of the measurement unit, an adequate coating for the optical fibers and a technique to integrate the coated optical fibers into geotextiles as they are commonly used in dike construction. We present several laboratory and field tests that prove the capability of the system to detect areas of soil displacement as small as 2 meters. These are the first tests of truly distributed strain measurements on optical fibers embedded into geosynthetics.
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Nils Nöther, Aleksander Wosniok, Katerina Krebber, and Elke Thiele "A distributed fiber optic sensor system for dike monitoring using Brillouin optical frequency domain analysis", Proc. SPIE 6933, Smart Sensor Phenomena, Technology, Networks, and Systems 2008, 69330T (7 April 2008); https://doi.org/10.1117/12.775133
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