Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/62747
Type: Artigo
Title: Characterisation of a Nafion film by optical fibre Fabry-Perot interferometry for humidity sensing
Author: Santos, J. S.
Raimundo Jr., I. M.
Cordeiro, C. M. B.
Biazoli, C. R.
Gouveia, C. A. J.
Jorge, P. A. S.
Abstract: Nafion has been evaluated as a sensing phase of an optical fibre humidity sensor based on a low-finesse Fabry-Perot interferometer. The sensor was constructed by manual deposition of a drop of a Nafion solution on the tip of a single mode optical fibre, forming a Fabry-Perot resonant cavity. The absorption of water by the Nafion film makes it swells, changing its refractive index and the length of the cavity, which produces a phase shift in the interference signal. The sensitivity, stability and response time of the sensor were evaluated in the RH range from 22 to 80% by analysing the correspondent reflection spectra of the interference fringes. As a result, it was obtained that Nafion can be used as sensing phase of an optical fibre humidity sensor based on optical fibre Fabry-Perot interferometry, presenting a response time of 242 ms (3% RH variation) and a sensitivity of 3.5 nm/%RH. (C) 2014 Elsevier B.V. All rights reserved.
Nafion has been evaluated as a sensing phase of an optical fibre humidity sensor based on a low-finesse Fabry-Perot interferometer. The sensor was constructed by manual deposition of a drop of a Nafion solution on the tip of a single mode optical fibre, forming a Fabry-Perot resonant cavity. The absorption of water by the Nafion film makes it swells, changing its refractive index and the length of the cavity, which produces a phase shift in the interference signal. The sensitivity, stability and response time of the sensor were evaluated in the RH range from 22 to 80% by analysing the correspondent reflection spectra of the interference fringes. As a result, it was obtained that Nafion can be used as sensing phase of an optical fibre humidity sensor based on optical fibre Fabry-Perot interferometry, presenting a response time of 242 ms (3% RH variation) and a sensitivity of 3.5 nm/%RH.
Subject: Fibras óticas
Interferometria
Fabry-Perot, Interferómetros de
Country: Holanda
Editor: Elsevier
Citation: Sensors And Actuators B-chemical. Elsevier Science Sa, v. 196, n. 99, n. 105, 2014.
Rights: fechado
Identifier DOI: 10.1016/j.snb.2014.01.101
Address: https://www.sciencedirect.com/science/article/pii/S0925400514001269
Date Issue: 2014
Appears in Collections:IFGW - Artigos e Outros Documentos

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