METHOD FOR PRODUCING AN OPTICAL FIBRE FOR A DISTRIBUTED MEASUREMENT OF TEMPERATURE OR DEFORMATION IN A HARSH ENVIRONMENT USING THE RAYLEIGH BACKSCATTERED SIGNAL

摘要

The invention pertains to the field of distributed measurement of temperature or deformation by optical reflectometry in the frequential domain using the Rayleigh backscattered signal in an optical fibre. The optical fibre comprises 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. The invention relates to a method for producing said optical fibre and to the use thereof. According to the invention, the method (10) comprises a step (19) 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.