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Optical fiber pressure sensor based on photoelasticity and its application

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5 Author(s)
Anbo Wang ; Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA ; He, S. ; Fang, X. ; Jin, X.
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An optical fiber pressure sensor based on the photoelastic effect using a novel compensation technique is described. Two optical sources and a polarization-splitting prism are incorporated into a sensor system to minimize output drifts. The four major factors-the optical source power, the fiber loss, the optical coupling loss, and the modal power distribution in fibers-are well compensated. The measurement range of 0-147 kPa has been obtained with accuracies of 0.2% within the temperature range of -10°C to 42°C and a resolution of 10 Pa has been achieved. Compensation for fiber loss has been observed up to -30 dB. This sensor system has been successfully put into practical operation for oil storage measurement in a tank

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Lightwave Technology, Journal of  (Volume:10 ,  Issue: 10 )