Long-term strain response of polymer optical fiber FBG sensors

Ivan-Lazar Bundalo, Kristian Nielsen, Getinet Woyessa, Ole Bang

    Research output: Contribution to journalJournal articleResearchpeer-review

    780 Downloads (Pure)

    Abstract

    We report on the viscoelastic response of PMMA microstructured polymer optical fibers (mPOFs) when exposed to long periods of strain and relaxation, with the strain period ranging from 0.5 min to 50 min. The behavior of the fibers was monitored by inscribing a fiber Bragg grating (FBG) in them and tracking the reflection peak. We demonstrate that the fiber, when relaxing from strains of up to 0.9%, has a two-phase recovery: initially linear (elastic driven) and subsequently nonlinear (viscoelastic driven) contraction. The linear (elastic) relaxation wavelength range depends both on the strain level and on the strain duration. For short strain durations, this wavelength range stays the same, but with increasing strain duration, it decreases, which will influence the operation range of mPOF and POFbased FBG sensors.
    Original languageEnglish
    JournalOptical Materials Express
    Volume7
    Issue number3
    Pages (from-to)967-976
    ISSN2159-3930
    DOIs
    Publication statusPublished - 2017

    Fingerprint

    Dive into the research topics of 'Long-term strain response of polymer optical fiber FBG sensors'. Together they form a unique fingerprint.

    Cite this