Hydrogel based Fabry-Pérot cavity for a pH sensor

Abdullah Al Noman; Jitendra Narayan Dash; Xin Cheng; Chern Yang Leong; Hwa Yaw Tam; Changyuan Yu

doi:10.1364/OE.414636

Hydrogel based Fabry-Pérot cavity for a pH sensor

Abdullah Al Noman, Jitendra Narayan Dash, Xin Cheng, Chern Yang Leong, Hwa Yaw Tam, Changyuan Yu

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

21 Citations (Scopus)

Abstract

A simple, reliable, and quick reactive Fabry-Pérot (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/°C.

Original language	English
Pages (from-to)	39648
Number of pages	1
Journal	Optics Express
Volume	28
Issue number	26
DOIs	https://doi.org/10.1364/OE.414636
Publication status	Published - 21 Dec 2020

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.414636

http://hdl.handle.net/10397/91104

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abstract = "A simple, reliable, and quick reactive Fabry-P{\'e}rot (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/°C.",

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AU - Dash, Jitendra Narayan

AU - Cheng, Xin

AU - Leong, Chern Yang

AU - Tam, Hwa Yaw

AU - Yu, Changyuan

N1 - Funding Information: Research Grants Council, University Grants Committee (15211317). Publisher Copyright: © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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Y1 - 2020/12/21

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Hydrogel based Fabry-Pérot cavity for a pH sensor

Abstract

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