| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7144019 | Sensors and Actuators B: Chemical | 2016 | 7 Pages |
Abstract
In this paper, a high sensitivity optical fiber pH sensor based on lossy mode resonance (LMR) generated with transversal electric (TE) and transversal magnetic (TM) polarized light is presented. Poly(allylamine hydrochloride) (PAH)/poly(acrylic acid) (PAA) polymeric thin-films fabricated onto side-polished D-shaped optical fibers are used as pH-sensitive as well as LMR supporting coatings. The adequate selection of the pH-sensitive coating fabrication parameters enables to obtain devices working at different pH regions. Two devices have been obtained in order to measure pH from 4.0 to 5.0 and from 7.0 to 8.0 respectively. Obtained optical fiber pH sensors based on TE and TM LMRs showed a maximum sensitivity of 69Â nm/pH, which means a resolution of â¼0.0008Â pH units by using a conventional communications Optical Spectrum Analyzer (OSA) with 0.06Â nm resolution.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
P. Zubiate, C.R. Zamarreño, I. Del Villar, I.R. Matias, F.J Arregui,