Wide-Range pH Sensor Based on a Smart-Hydrogel-Coated Long-Period Fiber Grating

Satyendra Kumar Mishra; Bing Zou; Kin Seng Chiang

doi:10.1109/JSTQE.2016.2629662

Wide-Range pH Sensor Based on a Smart-Hydrogel-Coated Long-Period Fiber Grating

Satyendra Kumar Mishra, Bing Zou, Kin Seng Chiang

Department of Electrical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

71 Citations (Scopus)

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Abstract

We report a fiber-optic sensor for pH measurement, which is a long-period fiber grating (LPFG) coated with smart hydrogel. When the pH of a solution that surrounds the hydrogel coating changes, the volume of the coating and hence its refractive index are changed, which results in a shift in the resonance wavelength of the LPFG. Our experimental sensor shows a sensitivity of ∼0.66 nm/pH over the pH range from 2 to 12 and a response time of less than 2 s. The effects of the refractive index of the surrounding solution and temperature variations on the sensor are also measured.

Original language	English
Article number	7745946
Journal	IEEE Journal on Selected Topics in Quantum Electronics
Volume	23
Issue number	2
Online published	16 Nov 2016
DOIs	https://doi.org/10.1109/JSTQE.2016.2629662
Publication status	Published - Mar 2017

Research Keywords

Chemical sensors
fiber gratings
optical fiber sensors

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED POSTPRINT FILE: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Mishra, S. K., Zou, B., & Chiang, K. S. (2017). Wide-Range pH Sensor Based on a Smart-Hydrogel-Coated Long-Period Fiber Grating. IEEE Journal on Selected Topics in Quantum Electronics, 23(2), [7745946]. https://doi.org/10.1109/JSTQE.2016.2629662.

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title = "Wide-Range pH Sensor Based on a Smart-Hydrogel-Coated Long-Period Fiber Grating",

abstract = "We report a fiber-optic sensor for pH measurement, which is a long-period fiber grating (LPFG) coated with smart hydrogel. When the pH of a solution that surrounds the hydrogel coating changes, the volume of the coating and hence its refractive index are changed, which results in a shift in the resonance wavelength of the LPFG. Our experimental sensor shows a sensitivity of ∼0.66 nm/pH over the pH range from 2 to 12 and a response time of less than 2 s. The effects of the refractive index of the surrounding solution and temperature variations on the sensor are also measured.",

keywords = "Chemical sensors, fiber gratings, optical fiber sensors",

author = "Mishra, {Satyendra Kumar} and Bing Zou and Chiang, {Kin Seng}",

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AU - Zou, Bing

AU - Chiang, Kin Seng

PY - 2017/3

Y1 - 2017/3

N2 - We report a fiber-optic sensor for pH measurement, which is a long-period fiber grating (LPFG) coated with smart hydrogel. When the pH of a solution that surrounds the hydrogel coating changes, the volume of the coating and hence its refractive index are changed, which results in a shift in the resonance wavelength of the LPFG. Our experimental sensor shows a sensitivity of ∼0.66 nm/pH over the pH range from 2 to 12 and a response time of less than 2 s. The effects of the refractive index of the surrounding solution and temperature variations on the sensor are also measured.

AB - We report a fiber-optic sensor for pH measurement, which is a long-period fiber grating (LPFG) coated with smart hydrogel. When the pH of a solution that surrounds the hydrogel coating changes, the volume of the coating and hence its refractive index are changed, which results in a shift in the resonance wavelength of the LPFG. Our experimental sensor shows a sensitivity of ∼0.66 nm/pH over the pH range from 2 to 12 and a response time of less than 2 s. The effects of the refractive index of the surrounding solution and temperature variations on the sensor are also measured.

KW - Chemical sensors

KW - fiber gratings

KW - optical fiber sensors

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DO - 10.1109/JSTQE.2016.2629662

M3 - RGC 21 - Publication in refereed journal

SN - 1077-260X

VL - 23

JO - IEEE Journal on Selected Topics in Quantum Electronics

JF - IEEE Journal on Selected Topics in Quantum Electronics

IS - 2

M1 - 7745946

ER -

Wide-Range pH Sensor Based on a Smart-Hydrogel-Coated Long-Period Fiber Grating

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GRF: Graphene Photonic Devices Based on Long-period Grating Structures

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Wide-Range pH Sensor Based on a Smart-Hydrogel-Coated Long-Period Fiber Grating

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GRF: Graphene Photonic Devices Based on Long-period Grating Structures

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