An optical fiber current sensor based on a permanent magnet fixed on the center of a micromachined Si membrane has been presented. The transducing operation principle is magneto-mechanical and has a linear response. A great improvement of the sensitivity of the microcavities was achieved by the use of a planar coil. Interrogation of the transducer has been carried out using a Fabry-Perot interferometer with an all-fiber detection system to avoid the influence of electromagnetic noise. The effectiveness of a fiber scheme based on the utilization of two fibre Bragg gratings to generate two quadrature phase-shifted interferometric signals has also been reported.


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    Title :

    Micromachined low-finesse Fabry-Perot interferometer for the measurement of low DC electrical currents


    Contributors:


    Publication date :

    2002-01-01


    Size :

    346847 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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