A novel multi-longitudinal mode fiber-optic vibration sensor is presented in this paper. It is made of a piece of fiber, a fiber Bragg grating and a coupler. The beat frequency of any two different laser modes is modulated by the vibration signal. The modulated beat frequency signal is frequency-modulated signal, thus it can be demodulated with the simple frequency-modulation technique. It is demonstrated that the vibration signal from 60 Hz to 20 KHz can be measured successfully. The sensor has high signal-to-noise ratio, especially between 500 Hz and 10 KHz.


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    Title :

    Multi-longitudinal mode fiber-optic vibration sensor


    Contributors:
    Liang Gao, (author) / Shengchun Liu, (author) / Zuowei Yin, (author) / Lin Chen, (author) / Xiangfei Chen, (author)


    Publication date :

    2011-10-01


    Size :

    722283 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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