Title :
Fiber optic differential interferometer
Author :
Yuan, Libo ; Zhou, Limin ; Jin, Wei
Author_Institution :
Dept. of Phys., Harbin Eng Univ., China
fDate :
8/1/2000 12:00:00 AM
Abstract :
Based on low-coherence interferometry in standard single-mode fibers, a differential interferometer has been proposed. A twin-reflective mirror demodulator was used in the differential interferometer. This interferometer can be used as a fiber optic sensor to measure the elongation of the fiber or strain substressed on the fiber and has the advantage that it can automatically compensate for temperature-induced variations in the refractive index and thermal expansion of the silica fibers
Keywords :
Michelson interferometers; compensation; differential detection; fibre optic sensors; gradient index optics; strain sensors; GRIN lenses; Michelson configuration; automatic compensation; calibration; fiber elongation measurement; fiber optic differential interferometer; fiber optic sensor; low-coherence interferometry; optical path length; refractive index; silica fibers; standard single-mode fibers; strain measurement; temperature-induced variations; thermal expansion; twin-reflective mirror demodulator; Capacitive sensors; Demodulation; Mirrors; Optical fiber sensors; Optical fibers; Optical interferometry; Refractive index; Silicon compounds; Strain measurement; Thermal expansion;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
