Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film

We demonstrate a simple and highly sensitive optical fiber relative humidity (RH) sensor based on a long-period fiber grating (LPFG) coated with polyethylene glycol (PEG)/polyvinyl alcohol (PVA) composite films. The resonance wavelength of the LPFG is sensitive to environmental humidity due to the c...

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Detalles Bibliográficos
Autores principales: Wang, Yunlong, Liu, Yunqi, Zou, Fang, Jiang, Chen, Mou, Chengbo, Wang, Tingyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6567328/
https://www.ncbi.nlm.nih.gov/pubmed/31100821
http://dx.doi.org/10.3390/s19102263
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author Wang, Yunlong
Liu, Yunqi
Zou, Fang
Jiang, Chen
Mou, Chengbo
Wang, Tingyun
author_facet Wang, Yunlong
Liu, Yunqi
Zou, Fang
Jiang, Chen
Mou, Chengbo
Wang, Tingyun
author_sort Wang, Yunlong
collection PubMed
description We demonstrate a simple and highly sensitive optical fiber relative humidity (RH) sensor based on a long-period fiber grating (LPFG) coated with polyethylene glycol (PEG)/polyvinyl alcohol (PVA) composite films. The resonance wavelength of the LPFG is sensitive to environmental humidity due to the change in effective refractive index caused by the strong surface absorption and desorption of the porous PEG/PVA coatings. The sensor is sensitive in a wide range from 50% to 95% RH, with a highest sensitivity of 2.485 nm/%RH in the range 50–75% RH. The proposed RH sensor has the advantages of compact size, good reversibility, and stability, which makes it attractive for high-humidity environments.
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spelling pubmed-65673282019-06-17 Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film Wang, Yunlong Liu, Yunqi Zou, Fang Jiang, Chen Mou, Chengbo Wang, Tingyun Sensors (Basel) Article We demonstrate a simple and highly sensitive optical fiber relative humidity (RH) sensor based on a long-period fiber grating (LPFG) coated with polyethylene glycol (PEG)/polyvinyl alcohol (PVA) composite films. The resonance wavelength of the LPFG is sensitive to environmental humidity due to the change in effective refractive index caused by the strong surface absorption and desorption of the porous PEG/PVA coatings. The sensor is sensitive in a wide range from 50% to 95% RH, with a highest sensitivity of 2.485 nm/%RH in the range 50–75% RH. The proposed RH sensor has the advantages of compact size, good reversibility, and stability, which makes it attractive for high-humidity environments. MDPI 2019-05-16 /pmc/articles/PMC6567328/ /pubmed/31100821 http://dx.doi.org/10.3390/s19102263 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Yunlong
Liu, Yunqi
Zou, Fang
Jiang, Chen
Mou, Chengbo
Wang, Tingyun
Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film
title Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film
title_full Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film
title_fullStr Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film
title_full_unstemmed Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film
title_short Humidity Sensor Based on a Long-Period Fiber Grating Coated with Polymer Composite Film
title_sort humidity sensor based on a long-period fiber grating coated with polymer composite film
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6567328/
https://www.ncbi.nlm.nih.gov/pubmed/31100821
http://dx.doi.org/10.3390/s19102263
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AT jiangchen humiditysensorbasedonalongperiodfibergratingcoatedwithpolymercompositefilm
AT mouchengbo humiditysensorbasedonalongperiodfibergratingcoatedwithpolymercompositefilm
AT wangtingyun humiditysensorbasedonalongperiodfibergratingcoatedwithpolymercompositefilm

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