US 11,971,310 B2
Method for producing an optical fibre for a distributed measurement of temperature or deformation in a harsh environment using the Rayleigh backscattered signal
Patrick Bulot, Villeneuve d'Ascq (FR); Remy Bernard, Villeneuve d'Ascq (FR); Odile Cristini, Villeneuve d'Ascq (FR); Monika Bouet, Marquette Lez Lille (FR); Guillaume Laffont, Meudon (FR); and Marc Douay, Villeneuve d'Ascq (FR)
Assigned to COMMISSARIAT A L'ENERGIE ATOMIQUE ET ENERGIES ALTERNATIVES, Paris (FR); CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR); and UNIVERSITE DE LILLE, Lille (FR)
Appl. No. 17/254,080
Filed by COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR); CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR); and UNIVERSITE DE LILLE, Lille (FR)
PCT Filed Jun. 21, 2019, PCT No. PCT/FR2019/051516
§ 371(c)(1), (2) Date Dec. 18, 2020,
PCT Pub. No. WO2019/243752, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 18 55602 (FR), filed on Jun. 22, 2018.
Prior Publication US 2021/0262868 A1, Aug. 26, 2021
Int. Cl. G01K 11/32 (2021.01); C03B 37/014 (2006.01); C03B 37/027 (2006.01); G01B 11/16 (2006.01); G02B 6/02 (2006.01)
CPC G01K 11/32 (2013.01) [C03B 37/0144 (2013.01); C03B 37/02718 (2013.01); G01B 11/16 (2013.01); G02B 6/0229 (2013.01); C03B 2201/40 (2013.01)] 11 Claims
OG exemplary drawing
 
1. 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.