Temperature Compensated Strain Sensor Based on Cascaded Sagnac Interferometers and All-Solid Birefringent Hybrid Photonic Crystal Fibers

Bobo Gu, Wu Yuan, Sailing He, Ole Bang

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We demonstrate a temperature compensated strain sensor with two cascaded Sagnac interferometers, that provide strain sensing and temperature compensation, respectively. The Sagnac interferometers use an all-solid hybrid photonic crystal fiber with stress-induced birefringence. The stress-induced birefringent fiber is known to offer the maximum strain sensitivity, but also to suffer from temperature crosstalk. Our experimental results show that the cascaded Sagnac sensor can suppress the crosstalk to a temperature upto 0.33 με/ºC, while still providing a high strain sensitivity of ~25.6 pm}/με.
    Original languageEnglish
    JournalI E E E Sensors Journal
    Volume12
    Issue number6
    Pages (from-to)1641-1646
    ISSN1530-437X
    DOIs
    Publication statusPublished - 2012

    Keywords

    • Cascaded Sagnac interferometers
    • Hybrid photonic crystal fiber
    • Temperature compensation

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