Open AccessAll-polymer fiber-optic pH sensor
Author(s) -
Xin Cheng,
Julien Bonefacino,
BaiOu Guan,
Hwa Yaw Tam
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.014610
Subject(s) - fiber bragg grating , materials science , polymer , ethylene glycol , fiber optic sensor , optical fiber , optics , fiber , phosfos , plastic optical fiber , composite material , chemistry , physics , organic chemistry
A novel all-polymer fiber-optic pH sensor using a UV-cured pH-sensitive hydrogel, poly(ethylene glycol) diacrylate (PEGDA), coated on a polymer fiber Bragg grating was developed. The PEGDA increased in volume according to the pH value of the surrounding fluid, which subsequently induced a lateral stress in the polymer fiber Bragg grating. The proposed pH sensor exhibits a pH sensitivity of up to -0.41 nm/pH and a fast response time of 30 s.