Hydrogel based fabry-perot cavity for a ph sensor

Al Noman, A; Dash, JN; Cheng, X; Leong, CY; Tam, HY; Yu, CY

doi:10.1364/OE.414636

Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/91104

Title:	Hydrogel based fabry-perot cavity for a ph sensor
Authors:	Al Noman, A Dash, JN Cheng, X Leong, CY Tam, HY Yu, CY
Issue Date:	Dec-2020
Source:	Optics express, 21 Dec. 2020, v. 28, no. 26, 414636
Abstract:	A simple, reliable, and quick reactive Fabry-Perot (FP) structure-based fiber optic pH sensor is presented. The pH-sensitive hydrogel and single-mode fiber (SMF) are placed inside a fused silica capillary to form the FP cavity. The gel thickness is characterized by the spin coating method with respect to different spin speeds. The proposed sensor shows a pH sensitivity of 0.30 nm/pH along with a fast response time of 15 s to 20 s for different pH solvents in the acidic range. Also, the temperature sensitivity of the FPI sensor is found to be -0.56 nm/degrees C. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Publisher:	Optical Society of America
Journal:	Optics express
EISSN:	1094-4087
DOI:	10.1364/OE.414636
Rights:	© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (https://www.osapublishing.org/library/license_v1.cfm#VOR-OA) 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 Abdullah Al Noman, Jitendra Narayan Dash, Xin Cheng, Chern Yang Leong, Hwa-Yaw Tam, and Changyuan Yu, "Hydrogel based Fabry-Pérot cavity for a pH sensor," Opt. Express 28, 39640-39648 (2020) is available at https://doi.org/10.1364/OE.414636.
Appears in Collections:	Journal/Magazine Article