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Article Dans Une Revue Optics and Laser Technology Année : 2024

An intrinsic sensitivity calibration scheme for high temperature measurements using femtosecond point-by-point written fiber Bragg gratings

Résumé

A calibration method is presented for temperature measurements using fiber Bragg grating transducers written with the point-by-point technique and femtosecond laser impulsions in silica optical fibers. This method is based on the determination of the wavelength-independent thermal sensitivity coefficients of the waveguide over the temperature range of interest. The calibration law is calculated using the wavelength comb-like spectrum of high order fiber Bragg gratings, allowing measurement accuracy comparable to type N thermocouples up to 900°C. The effects of thermal cycling and annealing on measurement errors are also discussed.
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vendredi 16 août 2024
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Dates et versions

cea-04459347 , version 1 (15-02-2024)

Identifiants

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Alexandre Lerner, Romain Cotillard, Thomas Blanchet, Nicolas Roussel, Géraud Bouwmans, et al.. An intrinsic sensitivity calibration scheme for high temperature measurements using femtosecond point-by-point written fiber Bragg gratings. Optics and Laser Technology, 2024, 170, pp.110278. ⟨10.1016/j.optlastec.2023.110278⟩. ⟨cea-04459347⟩
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