Utilising thermal annealing for multiplexing and sensitivity enhancement of polymer optical fibre sensors

A. Pospori*, C. A.F. Marques, G. Sagias, H. Lamela-Rivera, D. Sáez-Rodríguezd, K. Nielsen, O. Bang, D. J. Webb

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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    Abstract

    Thermal annealing was initially introduced for multiplexing purposes, since it can induce a permanent negative Bragg wavelength shift for polymer fibre grating sensors. At a later stage, it is shown that annealing can also provide additional benefits, such as strain and humidity sensitivity enhancement and augmented temperature operational range. In this paper, we report additional usage of thermal annealing on PMMA fibre Bragg grating sensors. We show the possibility to tune Bragg wavelengths to longer wavelengths permanently by stretching the polymer optical fibre during the thermal annealing process. An array of sensors fabricated with only one phase-mask, demonstrates the concept by having Bragg wavelengths below and above the original inscribed spectral position. In addition, we report that thermal annealing can be also used to enhance the performance of sensors when used for stress and force monitoring.

    Original languageEnglish
    Title of host publicationProceedings of SPIE
    EditorsKyriacos Kalli, Gilberto Brambilla, Sinead O'Keeffe
    Number of pages5
    Volume11199
    PublisherSPIE - International Society for Optical Engineering
    Publication date1 Jan 2019
    Article number111993E
    ISBN (Electronic)9781510631236
    DOIs
    Publication statusPublished - 1 Jan 2019
    Event7th European Workshop on Optical Fibre Sensors - Limassol, Cyprus
    Duration: 1 Oct 20194 Oct 2019
    Conference number: 7

    Conference

    Conference7th European Workshop on Optical Fibre Sensors
    Number7
    Country/TerritoryCyprus
    CityLimassol
    Period01/10/201904/10/2019
    SponsorOZ Optics Ltd.
    SeriesProceedings of SPIE - The International Society for Optical Engineering
    Volume11199
    ISSN0277-786X

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