23 July 1993 Optical fibre Fabry-Perot sensor for the detection of small vibrations and displacements
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Proceedings Volume 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology; 1983C8 (1993) https://doi.org/10.1117/12.2308859
Event: 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1993, Budapest, Hungary
Abstract
A new method to linearly measure the phase of light wave on interferometric fiber optic sensor is presented in this paper. We linearly modulate the phase of one optic fiber arm of Michelson a great quantity (2n or more). If this modulated light interferes with another arm , the subsequent interferential signal will be a cosine function, and it's phase includes the phase information of Michelson fiber optic sensor. If it is compared with the reference electric sine signal ,we will obtain the time difference of these two signal by pass- zero detection, and it is linear with the phase change of sensor resulted from environment factors. This method needs neither closed-loop servo system nor two LD light sources of different wave length, and it also needs no appendent optic fiber arm. This method is very simple to realize.
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I. Paulicka, "Optical fibre Fabry-Perot sensor for the detection of small vibrations and displacements", Proc. SPIE 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1983C8 (23 July 1993); doi: 10.1117/12.2308859; https://doi.org/10.1117/12.2308859
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