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

Arianna Piccolo | Zendy; Sylvie DelepineLesoille | Zendy; M. Landolt | Zendy; Stéphane Girard | Zendy; Y. Ouerdane | Zendy; C. Sabatier | Zendy

Open Access

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

Author(s) -

Arianna Piccolo,

Sylvie DelepineLesoille,

M. Landolt,

Stéphane Girard,

Y. Ouerdane,

C. Sabatier

Publication year - 2019

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.27.021608

Subject(s) - rayleigh scattering , brillouin scattering , brillouin zone , materials science , optics , attenuation , optical fiber , distributed acoustic sensing , radiation , atmospheric temperature range , temperature measurement , strain (injury) , fiber optic sensor , physics , medicine , quantum mechanics , meteorology

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.

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