Highly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber

A surface-plasmon-resonance-based fiber device is proposed for highly sensitive relative humidity (RH) sensing and human breath monitoring. The device is fabricated by using a polyvinyl alcohol (PVA) film and gold coating on the flat surface of a side-polished polymer optical fiber. The thickness an...

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Autores principales:	Ying Wang, Jingru Wang, Yu Shao, Changrui Liao, Yiping Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	optical fiber sensor surface plasmon resonance humidity sensing breath monitoring Biotechnology TP248.13-248.65
Acceso en línea:	https://doaj.org/article/af45034a75494bd5960d923812f941f1
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spelling	oai:doaj.org-article:af45034a75494bd5960d923812f941f12021-11-25T16:55:42ZHighly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber10.3390/bios111104612079-6374https://doaj.org/article/af45034a75494bd5960d923812f941f12021-11-01T00:00:00Zhttps://www.mdpi.com/2079-6374/11/11/461https://doaj.org/toc/2079-6374A surface-plasmon-resonance-based fiber device is proposed for highly sensitive relative humidity (RH) sensing and human breath monitoring. The device is fabricated by using a polyvinyl alcohol (PVA) film and gold coating on the flat surface of a side-polished polymer optical fiber. The thickness and refractive index of the PVA coating are sensitive to environmental humidity, and thus the resonant wavelength of the proposed device exhibits a redshift as the RH increases. Experimental results demonstrate an average sensitivity of 4.98 nm/RH% across an ambient RH ranging from 40% to 90%. In particular, the sensor exhibits a linear response between 75% and 90% RH, with a sensitivity of 10.15 nm/RH%. The device is suitable for human breath tests and shows an average wavelength shift of up to 228.20 nm, which is 10 times larger than that of a silica-fiber-based humidity sensor. The corresponding response and recovery times are determined to be 0.44 s and 0.86 s, respectively. The proposed sensor has significant potential for a variety of practical applications, such as intensive care and human health analysis.Ying WangJingru WangYu ShaoChangrui LiaoYiping WangMDPI AGarticleoptical fiber sensorsurface plasmon resonancehumidity sensingbreath monitoringBiotechnologyTP248.13-248.65ENBiosensors, Vol 11, Iss 461, p 461 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	optical fiber sensor surface plasmon resonance humidity sensing breath monitoring Biotechnology TP248.13-248.65
spellingShingle	optical fiber sensor surface plasmon resonance humidity sensing breath monitoring Biotechnology TP248.13-248.65 Ying Wang Jingru Wang Yu Shao Changrui Liao Yiping Wang Highly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber
description	A surface-plasmon-resonance-based fiber device is proposed for highly sensitive relative humidity (RH) sensing and human breath monitoring. The device is fabricated by using a polyvinyl alcohol (PVA) film and gold coating on the flat surface of a side-polished polymer optical fiber. The thickness and refractive index of the PVA coating are sensitive to environmental humidity, and thus the resonant wavelength of the proposed device exhibits a redshift as the RH increases. Experimental results demonstrate an average sensitivity of 4.98 nm/RH% across an ambient RH ranging from 40% to 90%. In particular, the sensor exhibits a linear response between 75% and 90% RH, with a sensitivity of 10.15 nm/RH%. The device is suitable for human breath tests and shows an average wavelength shift of up to 228.20 nm, which is 10 times larger than that of a silica-fiber-based humidity sensor. The corresponding response and recovery times are determined to be 0.44 s and 0.86 s, respectively. The proposed sensor has significant potential for a variety of practical applications, such as intensive care and human health analysis.
format	article
author	Ying Wang Jingru Wang Yu Shao Changrui Liao Yiping Wang
author_facet	Ying Wang Jingru Wang Yu Shao Changrui Liao Yiping Wang
author_sort	Ying Wang
title	Highly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber
title_short	Highly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber
title_full	Highly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber
title_fullStr	Highly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber
title_full_unstemmed	Highly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber
title_sort	highly sensitive surface plasmon resonance humidity sensor based on a polyvinyl-alcohol-coated polymer optical fiber
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/af45034a75494bd5960d923812f941f1
work_keys_str_mv	AT yingwang highlysensitivesurfaceplasmonresonancehumiditysensorbasedonapolyvinylalcoholcoatedpolymeropticalfiber AT jingruwang highlysensitivesurfaceplasmonresonancehumiditysensorbasedonapolyvinylalcoholcoatedpolymeropticalfiber AT yushao highlysensitivesurfaceplasmonresonancehumiditysensorbasedonapolyvinylalcoholcoatedpolymeropticalfiber AT changruiliao highlysensitivesurfaceplasmonresonancehumiditysensorbasedonapolyvinylalcoholcoatedpolymeropticalfiber AT yipingwang highlysensitivesurfaceplasmonresonancehumiditysensorbasedonapolyvinylalcoholcoatedpolymeropticalfiber
_version_	1718412856940036096

Highly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber

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