Coupled temperature and γ-radiation effect on silica-based optical fiber strain sensors based on Rayleigh and Brillouin scatterings - Université Jean-Monnet-Saint-Étienne Access content directly
Journal Articles Optics Express Year : 2019

Coupled temperature and γ-radiation effect on silica-based optical fiber strain sensors based on Rayleigh and Brillouin scatterings

Abstract

Coupled temperature and γ-ray influence on Brillouin (PPP-BOTDA) and Rayleigh (TW-COTDR) scatterings are quantified. Aging tests of these distributed strain measuring systems are performed on-line, up to 1 MGy, at room temperature, 80 ∘C, 100 ∘C and 120 ∘C. Brillouin and Rayleigh frequency shifts remain identical regardless of the temperature: 3 MHz (2 MHz) and 7 GHz (3 GHz) for Ge-doped (respectively F-doped) fiber at 1 MGy. Meanwhile, radiation-induced attenuation is diminished because of the higher temperature; hence, the maximal distance range is less deteriorated. These tests help to explain the origin of the Brillouin frequency shift under γ-rays, with an acoustic velocity variation of about 1 m/s in 1 MGy irradiated samples.

Dates and versions

ujm-02340629 , version 1 (30-10-2019)

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Cite

A. Piccolo, S. Delepine-Lesoille, M. Landolt, S. Girard, Y. Ouerdane, et al.. Coupled temperature and γ-radiation effect on silica-based optical fiber strain sensors based on Rayleigh and Brillouin scatterings. Optics Express, 2019, 27 (15), pp.21608. ⟨10.1364/OE.27.021608⟩. ⟨ujm-02340629⟩
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