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

Volume

20

Issue

21

fYear

2008

Firstpage

1802

Lastpage

1804

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.2004699

Filename

4604719