Title :
Stabilization of Fiber Bragg Gratings Against Gamma Radiation
Author :
Gusarov, A. ; Vasiliev, S. ; Medvedkov, O. ; Mckenzie, I. ; Berghmans, F.
Author_Institution :
SCK CEN, Mol
Abstract :
The effect of gamma-radiation on the spectral characteristics of FBGs has been studied experimentally. The FBGs were fabricated in optical fibers with a GeO2 concentration in the core in a range from several to 99 mol.%. Various pre- and post-fabrication treatments were applied with the aim to improve the radiation tolerance of the FBGs. The best result was obtained for a Type IIa annealed grating written in SM310 fiber, where the Bragg peak shift saturated at a 12 pm level and an amplitude change of 0.04 dB with the maximal dose of about 50 kGy.
Keywords :
Bragg gratings; annealing; gamma-ray effects; germanium compounds; optical fibre fabrication; thermal stability; Bragg peak shift; FBG fabrication; FBG spectral characteristics; GeO2; GeO2 concentration; SM310 fiber; Type IIa annealed grating; fiber Bragg gratings stabilization; gamma radiation effect; postfabrication treatment; prefabrication treatments; radiation tolerance; Bragg gratings; Fiber gratings; Gamma rays; Optical fiber sensors; Optical fibers; Optical saturation; Optical sensors; Sensor systems; Silicon compounds; Temperature sensors; Annealing; fiber Bragg gratings; hydrogen loading; radiation effects;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2008.2001038
