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AssigneesCommissariat A L'energie Atomique Et Energies Alternatives, Centre National De La Recherche Scientifique, Universite De Lille
InventorsPatrick Bulot, Remy Bernard, Odile Cristini, Monika Bouet, Guillaume Laffont, Marc Douay
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An optical fibre, for use in the field of distributed measurement of temperature or deformation by optical reflectometry in the frequency domain using the Rayleigh backscattered signal in the fibre, includes a core doped with nanoparticles for example formed from gold particles covered with zirconium oxide, and can be subjected to high temperatures during the measurement. A method for producing the optical fibre includes a step of heat treatment during which the optical fibre is subjected, for a duration of at least one hour, to a heat treatment temperature higher than a maximum temperature to which it will be subjected during a measurement.
A method for manufacturing an optical fibre configured to be used for a distributed measurement of temperature or of deformation by optical frequency domain reflectometry using a Rayleigh backscattered signal, the optical fibre comprising a core into which nanoparticles are inserted, the optical fibre being configured to be subjected, during the measurement, to temperatures in a predetermined range of measurement temperatures, the method comprising, after a step of drawing a preform allowing the optical fibre to be formed, a step of heat treatment during which the optical fibre is subjected to a heat treatment temperature greater than or equal to an upper limit of the predetermined range of measurement temperatures for a duration greater than or equal to one hour.
Dependencies are inferred from the claim text.