Humidity insensitive TOPAS polymer fiber Bragg grating sensor

Scott Wu Yuan, Lutul Khan, David J. Webb, Kyriacos Kalli, Henrik K. Rasmussen, Alessio Stefani, Ole Bang

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    Abstract

    We report the first experimental demonstration of a humidity insensitive polymer optical fiber Bragg grating (FBG), as well as the first FBG recorded in a TOPAS polymer optical fiber in the important low loss 850nm spectral region. For the demonstration we have fabricated FBGs with resonance wavelength around 850 nm and 1550 nm in single-mode microstructured polymer optical fibers made of TOPAS and the conventional poly (methyl methacrylate) (PMMA). Characterization of the FBGs shows that the TOPAS FBG is more than 50 times less sensitive to humidity than the conventional PMMA FBG in both wavelength regimes. This makes the TOPAS FBG very appealing for sensing applications as it appears to solve the humidity sensitivity problem suffered by the PMMA FBG.
    Original languageEnglish
    JournalOptics Express
    Volume19
    Issue number20
    Pages (from-to)19731-19739
    ISSN1094-4087
    DOIs
    Publication statusPublished - 2011

    Bibliographical note

    © 2011 Optical Society of America
    We would like to acknowledge support from the Danish National Advanced Technology

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