Title :
Optical fiber pressure sensor based on photoelasticity and its application
Author :
Wang, Anbo ; He, Se ; Fang, Xiaojan ; Jin, Xiaodan ; Lin, Junxiu
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
fDate :
10/1/1992 12:00:00 AM
Abstract :
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
Keywords :
compensation; fibre optic sensors; optical losses; optical prisms; photoelasticity; pressure sensors; -10 to 42 degC; 0 to 147 kPa; compensation technique; light sources; measurement range; modal power distribution; oil storage measurement; optical coupling loss; optical fiber pressure sensor; optical source power; optical sources; output drifts; photoelastic effect; polarization-splitting prism; sensor system; tank; temperature range; Optical coupling; Optical fiber losses; Optical fiber polarization; Optical fiber sensors; Optical fibers; Optical sensors; Photoelasticity; Power distribution; Sensor phenomena and characterization; Sensor systems;
Journal_Title :
Lightwave Technology, Journal of
