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A network for large numbers of interferometric sensors and fiber Bragg gratings with high resolution and extended range

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2 Author(s)
McGarrity, C. ; Phys. Lab., Kent Univ., Canterbury, UK ; Jackson, D.A.

We describe an active form of a frequency division matrix array network developed to support both interferometric sensors and fiber Bragg gratings to demodulate both quasistatic and periodic measurands. Novel telemetry allows an improved measurement range using a single source and uses a fundamental interferometric principle for self-calibration. High resolution is achieved through active but remote demodulation of passive sensors. A resolution of 0.019 nm with a measurement range of 62.8 μm for an interferometric sensor and a strain resolution of 0.19 με with a measurement range of 6.28 mε was obtained for fiber Bragg grating sensors

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Lightwave Technology, Journal of  (Volume:16 ,  Issue: 1 )