Title :
High total dose radiation effects on temperature sensing fiber Bragg gratings
Author :
Gusarov, A.I. ; Berghmans, F. ; Deparis, O. ; Fernandez, A. Fernandez ; Defosse, Y. ; Mégret, P. ; Décreton, M. ; Blondel, M.
Author_Institution :
Faculte Polytech. de Mons, Belgium
Abstract :
Fiber Bragg gratings (FBGs) written in a 10 mol.% Ge-doped core silica fiber using a phase mask were exposed to /spl gamma/-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.
Keywords :
Bragg gratings; fibre optic sensors; gamma-ray effects; temperature measurement; /spl gamma/-radiation; Bragg peak amplitude; Bragg wavelength; FBG; Ge-doped core silica fiber; grating parameters; grating temperature sensitivity; high total dose radiation effects; optimization; phase mask; radiation-induced shift; reflection spectra; temperature sensing fiber Bragg gratings; transmission; Bragg gratings; Fiber gratings; Optical fiber losses; Optical fiber sensors; Optical fibers; Optoelectronic and photonic sensors; Radiation effects; Silicon compounds; Temperature dependence; Temperature sensors;
Journal_Title :
Photonics Technology Letters, IEEE
