Behavior of fibre Bragg gratings under high total dose gamma radiation

Author

Gusarov, A.I. ; Berghmans, F. ; Fernandez, A. Fernandez ; Deparis, O. ; Defosse, Y. ; Starodubov, D. ; Decréton, M. ; Mégret, P. ; Bondel, M.

Author_Institution

Fac. Polytech. de Mons, Mons, Belgium

Volume

47

Issue

3

fYear

2000

fDate

6/1/2000 12:00:00 AM

Firstpage

688

Lastpage

692

Abstract

We report on the effect of MGy dose level γ-irradiation on the parameters of fibre Bragg gratings intended for sensing applications. The γ-radiation sensitivities of gratings written with near-UV 330 nm light in hydrogen loaded Ge-doped fibres and of a grating written in a N-doped fibre were found to be higher than that of gratings written in a 10 mol.% Ge-doped fibre without hydrogen loading. In the former cases, changes in the amplitude and the width of the Bragg peak were observed during γ-irradiation while no change was observed in the latter case. For the grating written in the N-doped fibre, the radiation-induced shift of the Bragg peak did not saturate while for gratings written in hydrogen-loaded Ge-doped fibres it saturated to a higher level than for gratings written in unloaded Ge-doped fibre

Keywords

Bragg gratings; fibre optic sensors; gamma-ray effects; germanium; nitrogen; silicon compounds; 330 nm; Bragg peak; SiO₂:Ge; SiO₂:N; fibre Bragg gratings; gamma radiation; radiation-induced shift; sensing applications; total dose; Bragg gratings; Fiber gratings; Gamma rays; Hydrogen; Optical fiber communication; Optical fiber sensors; Optical fibers; Optical reflection; Reflectivity; Temperature sensors;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.856499

Filename

856499