Title :
High-sensitivity optical chemsensor based on etched D-fibre Bragg gratings
Author :
Zhou, K. ; Chen, X. ; Zhang, L. ; Bennion, I.
Author_Institution :
Photonics Res. Group, Aston Univ., Birmingham, UK
Abstract :
A novel and simple optical chemsensor concept based on cladding etched Bragg gratings UV-inscribed in D-fibre is reported. The sensitisation process of the Bragg structure to the refractive index of surrounding-medium under HF-etching has been investigated. Two etched devices were used to measure the concentrations of sugar solution, giving sensitivity as high as 0.02 nm/%.
Keywords :
Bragg gratings; chemical sensors; etching; fibre optic sensors; optical fibre cladding; optical fibre fabrication; refractive index; sugar; Bragg structure; HF-etching; UV-inscribed D-fibre; cladding; etched D-fibre Bragg gratings; high-sensitivity optical chemsensor; refractive index; sensitisation process; sugar solution;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20040177
