Chinese Journal of Quantum Electronics, Volume. 24, Issue 4, 495(2007)

Signal demodulation algorithm of fiber optic gyroscope based on 3×3 coupler

Ying LI* and Xing-lin CHEN
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  • [in Chinese]
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    Nonreciprocal structure open-loop fiber optic gyroscope(FOG)composed of 3×3 coupler has the advantages of high-sensitivity and wide-gauging range. The signal detection plays important role in the FOG system. The demodulation precision influences the maximum resolution of the gyro directly. According to characteristics of output signal model of FOG which uses 3×3 coupler,new signal demodulation algorithm is adopted. It can accurately demodulation arbitrary input of dynamic range. It overcomes disadvantage which is lowsensitivity round±π/2 work point,and improves precision of measured signal. Experimental results indicate that algorithm demodulate the measured physical variable quickly and exactly.

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    LI Ying, CHEN Xing-lin. Signal demodulation algorithm of fiber optic gyroscope based on 3×3 coupler[J]. Chinese Journal of Quantum Electronics, 2007, 24(4): 495

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    Paper Information

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    Received: Aug. 8, 2006

    Accepted: --

    Published Online: Jun. 7, 2010

    The Author Email: Ying LI (liying0429@163.com)

    DOI:

    CSTR:32186.14.

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