Kurzbeschreibung
(Englisch)
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This project will develop new technical solutions for distributed fibre sensors to respond to the growing demand by the society for a better control of the natural threats and the dangers originating from human activities. This should lead to sensors with increased performance either in terms of spatial resolution or of covered range. This requires to go technically well beyond the state-of-the-art by developing novel configurations related to a better knowledge of the physical effects, at the top level of the research in the field. The configurations will be compared and tested in a real scale through the collaboration with COST partners.
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Partner und Internationale Organisationen
(Englisch)
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AT, BE, CH, CY, CZ, DE, DK, EL, ES, FI, FR, IE, IL, IT, NL, PL, PT, RO, RS, SI, SK, UK
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Abstract
(Englisch)
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This project develops new technical solutions for distributed fibre sensors to respond to the growing demand by the society for a better control of the natural threats and the dangers originating from human activities. This leads to sensors with increased performance either in terms of spatial resolution or of covered range. This requires to go technically well beyond the state-of-the-art by developing novel configurations related to a better knowledge of the physical effects, at the top level of the research in the field. The configurations are compared and tested in a real scale through the collaboration with COST partners. During the third and final year, an impressive collection of results have been obtained: the full modelling of distributed Brillouin sensor has been achieved and a novel configuration of Brillouin sensors has been invented. A technique to enlarge the distance range has been demonstrated combining time- and frequency division multiplexing by combining our expertise with that of a COST partner. Finally we could reach the record number of resolved points of 1'000'000 - more precisely a spatial resolution of 14mm over 17km which is considered as a major milestone. At the end of this project we implemented totally disruptive novel configurations for distributed fibre sensors that are not based on Brillouin scattering. The purpose has been to make major breakthroughs in the performance and the first results are totally fulfilling the expectations. Using coherent Rayleigh reflectometry we could realize an extreme sensitivity of 1 millikelvin in the temperature resolution. We also implement a novel approach using 'faint ultra-long Bragg gratings', which must be the ideal configuration for a distributed fibre sensor in term of sensitivity and response. These developments have been realized in tight collaboration with the COST Action partners.
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