Title :
Effect of the Fiber Coating on the Radiation Sensitivity of Type I FBGs
Author :
Gusarov, A. ; Chojetzki, C. ; Mckenzie, I. ; Thienpont, H. ; Berghmans, F.
Author_Institution :
SCK-CEN, Mol
Abstract :
We have studied the influence of the fiber coating on the radiation sensitivity of fiber Bragg gratings (FBGs). These FBGs are draw tower gratings written before applying the coating in a fiber with a photosensitive 18-mol.% GeO2-doped core. Using a Co60 source we irradiated polyimide, acrylate, and ormocer coated gratings as well as mechanically stripped ormocer coated FBGs up to a 40-kGy dose. This total dose level corresponds to a near-earth space radiation environment mission. We show that the coating type must be taken into account for correctly interpreting ionizing radiation effects on FBGs.
Keywords :
Bragg gratings; cobalt; optical fibre cladding; optical fibre fabrication; optical fibre testing; optical films; optical polymers; radiation effects; 60Co; GeO2; acrylate coated gratings; draw tower gratings; fiber Bragg grating; fiber coating; ionizing radiation effects; mechanically stripped ormocer coated FBG; near-earth space radiation; ormocer coated gratings; photosensitive GeO2-doped core; polyimide coated gratings; radiation absorbed dose 40 kGy; radiation sensitivity; type I FBG; Fiber Bragg gratings (FBGs); optical fiber radiation effects;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.2004699
