Packaged sapphire fiber Bragg gratings ability to withstand temperature up to 1500°C - Département Métrologie Instrumentation & Information
Communication Dans Un Congrès Année : 2023

Packaged sapphire fiber Bragg gratings ability to withstand temperature up to 1500°C

Résumé

A fiber Bragg grating has been inscribed in a 100-µm diameter sapphire optical fiber with the phase mask technique and a fs-laser emitting at 800 nm. The grating was placed inside a sealed alumina capillary to protect the fiber from the environment. Then the fiber was set inside an oven and cycled up 7 times to a maximum temperature of 1500°C during 2 h. We observed that after two cycles, the grating is stabilized and no more hysteresis on the Bragg wavelength is observed. However, the temperature uncertainty is as high as 15°C and is principally due to modal interference. Then the grating is submitted to a 3-day annealing and two annealing successive 4-day annealing – for a total of eleven days – at a temperature of 1500°C. During this treatment, the grating amplitude remained constant and the Bragg wavelength showed no significant drift. As a conclusion, the packaged grating did not exhibit any erasure during these annealing experiments and perform reliable temperature measurement up to 1500°C.
Fichier principal
Vignette du fichier
Blanchet_Abstract_EWOFS_2023.pdf (388.95 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

cea-04189376 , version 1 (28-08-2023)

Identifiants

Citer

Thomas Blanchet, Sylvain Magne, Guillaume Laffont. Packaged sapphire fiber Bragg gratings ability to withstand temperature up to 1500°C. EWOFS 2023 - European Workshop on Optical Fibre Sensors, May 2023, Mons, Belgium. pp.126432O, ⟨10.1117/12.2678533⟩. ⟨cea-04189376⟩
103 Consultations
27 Téléchargements

Altmetric

Partager

More