Performances of PMMA-based optical fiber bragg grating sensor in extended temperature range

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dc.contributor.authorZhang, Wei
dc.contributor.authorWebb, David J.
dc.date.accessioned2021-05-24T16:01:23Z
dc.date.available2021-05-24T16:01:23Z
dc.date.issued2021-05-23
dc.description.abstractPMMA based optical fiber Bragg grating (POFBG) sensors are investigated in an environmental chamber with controlled temperature and relative humidity at temperature extended to 70 °C. At below a critical temperature of 50 °C the POFBG sensor exhibits good linearity and sensitivity for both temperature and humidity sensing. Nonlinear responses are observed at higher temperature, giving rise to varying, reduced magnitudes of sensitivities. An important feature of POFBG humidity sensing is observed at above critical temperature where the POFBG humidity sensitivity turns from positive to negative. A theoretical model based on Lorentz–Lorenz equation is presented to estimate the dependence of POFBG refractive index on temperature and relative humidity. The experimental results qualitatively agree with the theoretical analysesen_UK
dc.identifier.citationZhang W, Webb DJ. (2021) Performances of PMMA-based optical fiber bragg grating sensor in extended temperature range. Photonics, Volume 8, Issue 6, June 2021, Article number 180en_UK
dc.identifier.issn2304-6732
dc.identifier.urihttps://doi.org/10.3390/photonics8060180
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/16716
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectrefractive index humidity dependenceen_UK
dc.subjectthermo-optic effecten_UK
dc.subjectpolymer optical fiberen_UK
dc.subjectfiber Bragg gratingsen_UK
dc.titlePerformances of PMMA-based optical fiber bragg grating sensor in extended temperature rangeen_UK
dc.typeArticleen_UK

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