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  • Quasi-distributed long-gauge fiber optic sensor system
    Linec, Matjaž ; Đonlagić, Denis
    This paper presents a quasi-distributed, long-gauge, sensor system for measurement optical path length variation. This system can be directly applied to long gauge strain and/or temperature sensing. ... The proposed sensor system is comprised of sensing fiber, which is divided into the sensorćs segments separated by semi reflective mirrors made out of standard optical connectors. Short duration radio-frequency modulated optical bursts are launched into the sensing fiber and phase differences among individual reflected bursts are measured to determine the optical path-length variations among neighboring mirrors. Twenty sensing fiber segments were successfully addressed by a single-signal processor, while relying on standard telecommunication PIN diode, and a Fabry Perot laser diode. The resolution of a fiber-length variation better than 5 ìm was demonstrated in practice. Since the long sections of fiber can be employed for constructing individual sensors within the sensor's array, a microstrain resolution can be achieved in practice. The drift of the sensorćs system can be predominantly attributed to the temperature sensitivity of the electronic components, which proved to be below 20 um/°C. The entire system relies on simple and widely-used components that are low-cost.
    Vir: Optics express [Elektronski vir]. - ISSN 1094-4087 (Vol. 17, no. 14, Jul. 2009, str. 11515-11529)
    Vrsta gradiva - članek, sestavni del
    Leto - 2009
    Jezik - angleški
    COBISS.SI-ID - 13292822

    Povezava(-e):

    http://www.opticsinfobase.org/oe/Issue.cfm
    Digitalna knjižnica Univerze v Mariboru – DKUM

vir: Optics express [Elektronski vir]. - ISSN 1094-4087 (Vol. 17, no. 14, Jul. 2009, str. 11515-11529)
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