Effects of pre-strain on the intrinsic pressure sensitivity of polymer optical fiber Bragg-gratings

Jens Kristian Mølgaard Pedersen, Getinet Woyessa, Kristian Nielsen, Ole Bang

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    Abstract

    We experimentally demonstrate a scheme for improving the intrinsic pressure sensitivity of fiber Bragg-gratings (FBGs) inscribed in polymer optical fibers by applying pre-strain in order to suppress the pressure induced mechanical contraction of the fiber. This contraction would otherwise contribute to a blueshift of the Brag-wavelength, counteracting the dominant redshift caused by the stress-optic effect, which effectively reduces the pressure sensitivity of the FBG. By applying this technique we are able to improve the sensitivity of the FBG from 2.8 pm/bar to 7.3 pm/bar. © (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only
    Original languageEnglish
    Title of host publicationProceedings of SPIE
    Number of pages4
    Volume10323
    PublisherSPIE - International Society for Optical Engineering
    Publication date2017
    Article number103234U
    DOIs
    Publication statusPublished - 2017
    Event25th International Conference on Optical Fiber Sensors - Jeju, Korea, Republic of
    Duration: 24 Apr 201728 Apr 2017

    Conference

    Conference25th International Conference on Optical Fiber Sensors
    Country/TerritoryKorea, Republic of
    CityJeju
    Period24/04/201728/04/2017
    SeriesProceedings of SPIE - The International Society for Optical Engineering
    ISSN0277-786X

    Bibliographical note

    Copyright 2017 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

    Keywords

    • Fiber Bragg-grating
    • Polymer optical fiber
    • Hydrostatic pressure sensing

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