Title :
Design of high-sensitivity photoelastic optical fiber pressure sensor: a differential approach
Author :
Changsen Sun ; Liqin Wang ; Yu Wang ; Junxiu Lin
Author_Institution :
Dept. of Phys., Dalian Univ. of Technol., China
fDate :
7/1/1997 12:00:00 AM
Abstract :
A differential method is described for an optical fiber photoelastic pressure sensor to implement high sensitivity and low drift optically. The method relies on importing two orthogonal polarization light beams into the system alternately in time to produce two differential output signals that are derived from conventional compensation methods. The difference of the two output signals can reduce the long-term drift significantly. The measurement range of 0/spl sim/0.15 MPa has been demonstrated with an accuracy of 0.1% within the temperature range of -20/spl deg/C/spl sim/50/spl deg/C. The practical application proves its efficiency.
Keywords :
compensation; fibre optic sensors; level measurement; optical design techniques; optical fibres; photoelasticity; pressure sensors; sensitivity; -20 to 50 C; 0 to 0.15 MPa; compensation methods; differential method; differential output signals; high sensitivity; long-term drift reduction; low drift; measurement range; oil tank level monitoring; optical fiber photoelastic pressure sensor design; orthogonal polarization light beams; temperature range; Optical design; Optical fiber losses; Optical fiber polarization; Optical fiber sensors; Optical fibers; Optical filters; Optical receivers; Optical sensors; Photoelasticity; Sun;
Journal_Title :
Photonics Technology Letters, IEEE
