Fiber optic hydrogen sensor based on an etched Bragg grating coated with palladium

Detalhes bibliográficos
Autor(a) principal: Luís Carlos Coelho
Data de Publicação: 2015
Outros Autores: José Almeida, José Luís Santos, Diana Viegas
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://repositorio.inesctec.pt/handle/123456789/4564
http://dx.doi.org/10.1364/ao.54.010342
Resumo: A study of a sensor for hydrogen (H-2) detection based on fiber Bragg gratings coated with palladium (Pd) with self-temperature compensation is presented. The cladding around the gratings was reduced down to 50 mu m diameter by a chemical etching process. One of the gratings was left uncoated, and the other was coated with 150 nm of Pd. It was observed that palladium hydride has unstable behavior in environments with high humidity level. A simple solution to overcome this problem based on a Teflon tape is presented. The sensing device studied was able to respond to H-2 concentrations in the range 0%-1% v/v at room temperature and atmospheric pressure, achieving sensitivities larger than 20 pm/% v/v. Considering H-2 concentrations in nitrogen up to 1%, the performance of the sensing head was characterized for different thicknesses of Pd coating ranging from 50 to 200 nm. (C) 2015 Optical Society of America
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spelling Fiber optic hydrogen sensor based on an etched Bragg grating coated with palladiumA study of a sensor for hydrogen (H-2) detection based on fiber Bragg gratings coated with palladium (Pd) with self-temperature compensation is presented. The cladding around the gratings was reduced down to 50 mu m diameter by a chemical etching process. One of the gratings was left uncoated, and the other was coated with 150 nm of Pd. It was observed that palladium hydride has unstable behavior in environments with high humidity level. A simple solution to overcome this problem based on a Teflon tape is presented. The sensing device studied was able to respond to H-2 concentrations in the range 0%-1% v/v at room temperature and atmospheric pressure, achieving sensitivities larger than 20 pm/% v/v. Considering H-2 concentrations in nitrogen up to 1%, the performance of the sensing head was characterized for different thicknesses of Pd coating ranging from 50 to 200 nm. (C) 2015 Optical Society of America2017-12-20T21:35:21Z2015-01-01T00:00:00Z2015info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://repositorio.inesctec.pt/handle/123456789/4564http://dx.doi.org/10.1364/ao.54.010342engLuís Carlos CoelhoJosé AlmeidaJosé Luís SantosDiana Viegasinfo:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-05-15T10:19:54Zoai:repositorio.inesctec.pt:123456789/4564Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:52:24.304204Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Fiber optic hydrogen sensor based on an etched Bragg grating coated with palladium
title Fiber optic hydrogen sensor based on an etched Bragg grating coated with palladium
spellingShingle Fiber optic hydrogen sensor based on an etched Bragg grating coated with palladium
Luís Carlos Coelho
title_short Fiber optic hydrogen sensor based on an etched Bragg grating coated with palladium
title_full Fiber optic hydrogen sensor based on an etched Bragg grating coated with palladium
title_fullStr Fiber optic hydrogen sensor based on an etched Bragg grating coated with palladium
title_full_unstemmed Fiber optic hydrogen sensor based on an etched Bragg grating coated with palladium
title_sort Fiber optic hydrogen sensor based on an etched Bragg grating coated with palladium
author Luís Carlos Coelho
author_facet Luís Carlos Coelho
José Almeida
José Luís Santos
Diana Viegas
author_role author
author2 José Almeida
José Luís Santos
Diana Viegas
author2_role author
author
author
dc.contributor.author.fl_str_mv Luís Carlos Coelho
José Almeida
José Luís Santos
Diana Viegas
description A study of a sensor for hydrogen (H-2) detection based on fiber Bragg gratings coated with palladium (Pd) with self-temperature compensation is presented. The cladding around the gratings was reduced down to 50 mu m diameter by a chemical etching process. One of the gratings was left uncoated, and the other was coated with 150 nm of Pd. It was observed that palladium hydride has unstable behavior in environments with high humidity level. A simple solution to overcome this problem based on a Teflon tape is presented. The sensing device studied was able to respond to H-2 concentrations in the range 0%-1% v/v at room temperature and atmospheric pressure, achieving sensitivities larger than 20 pm/% v/v. Considering H-2 concentrations in nitrogen up to 1%, the performance of the sensing head was characterized for different thicknesses of Pd coating ranging from 50 to 200 nm. (C) 2015 Optical Society of America
publishDate 2015
dc.date.none.fl_str_mv 2015-01-01T00:00:00Z
2015
2017-12-20T21:35:21Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://repositorio.inesctec.pt/handle/123456789/4564
http://dx.doi.org/10.1364/ao.54.010342
url http://repositorio.inesctec.pt/handle/123456789/4564
http://dx.doi.org/10.1364/ao.54.010342
dc.language.iso.fl_str_mv eng
language eng
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instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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