High total dose radiation effects on temperature sensing fiberBragg gratings |
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Authors: | Gusarov AI Berghmans F Deparis O Fernandez AF Defosse Y Megret P Decreton M Blondel M |
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Affiliation: | Faculte Polytech. de Mons; |
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Abstract: | Fiber Bragg gratings (FBGs) written in a 10 mol.% Ge-doped core silica fiber using a phase mask were exposed to γ-radiation. The transmission and reflection spectra were recorded during irradiation up to doses in excess of 1 MGy. There was no detectable change of the Bragg peak amplitude and the grating temperature sensitivity. The radiation-induced shift of the Bragg wavelength saturated at a dose of 0.1 MGy at a level less than 25 pm, which could still be decreased by optimization of the grating parameters. Our results confirm that FBGs are good candidates for sensing applications in radiation environments |
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