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Title: All-polymer fiber-optic pH sensor
Authors: Cheng, X 
Bonefacino, J 
Guan, BO
Tam, HY 
Issue Date: 2018
Publisher: Optical Society of America
Source: Optics express, 28 May 2018, v. 26, no. 11, p. 14610-14616 How to cite?
Journal: Optics express 
Abstract: 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.
EISSN: 1094-4087
DOI: 10.1364/OE.26.014610
Rights: © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (
© 2018 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
The following publication Cheng, X., Bonefacino, J., Guan, B. O., & Tam, A. H. Y. (2018). All-polymer fiber-optic pH sensor. Optics Express, 26(11), 14610-14616 is available at
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