All-polymer fiber-optic pH sensor

X. Cheng, J. Bonefacino, B. O. Guan, And H.Y. Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

49 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)14610-14616
Number of pages7
JournalOptics Express
Issue number11
Publication statusPublished - 28 May 2018

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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