title: Differential strain measurement using multiplexed fiber Bragg grating sensors.
abstract: We investigate differential measurement of strain using fiber Bragg gratings and spatial demultiplexing methods. Differential measurement is shown to improve strain resolution in the presence of noise by an average of 34% compared to absolute measurements of the Bragg wavelengths. Spatial demultiplexing of the gratings provides potentially high-resolution sensing without calculating the sensor wavelengths. The differential method is still temperature dependent. We apply the differential technique to the problem of oil-water boundary detection in production columns, with promising preliminary results.
authors.affiliation: Department of Electrical Engineering, University of Tulsa, 600 South College Avenue, Tulsa, Oklahoma 74104-3189, USA. pgl@ohm.ee.utulsa.edu
authors.forename: Peter G
authors.initials: PG
authors.lastname: LoPresti
authors.forename: Dilip
authors.initials: D
authors.lastname: Jali
authors.forename: Christopher
authors.initials: C
authors.lastname: Shrock
mesh_terms: D000465:Algorithms; D005240:Feasibility Studies; D005336:Fiber Optic Technology; D007368:Interferometry / Q000295:instrumentation / Q000379:methods*; D012031:Refractometry / Q000295:instrumentation / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers