Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/85728
Type: Artigo de periódico
Title: Characterisation Of A Nafion Film By Optical Fibre Fabry-perot Interferometry For Humidity Sensing
Author: Santos J.S.
Raimundo 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. © 2014 Elsevier B.V.
Editor: 
Rights: fechado
Identifier DOI: 10.1016/j.snb.2014.01.101
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-84894718441&partnerID=40&md5=6ac6ad997e9c0e9ff0fe184c51c00708
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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