Title :
A network for large numbers of interferometric sensors and fiber Bragg gratings with high resolution and extended range
Author :
McGarrity, Craig ; Jackson, David A.
Author_Institution :
Phys. Lab., Kent Univ., Canterbury, UK
fDate :
1/1/1998 12:00:00 AM
Abstract :
We describe an active form of a frequency division matrix array network developed to support both interferometric sensors and fiber Bragg gratings to demodulate both quasistatic and periodic measurands. Novel telemetry allows an improved measurement range using a single source and uses a fundamental interferometric principle for self-calibration. High resolution is achieved through active but remote demodulation of passive sensors. A resolution of 0.019 nm with a measurement range of 62.8 μm for an interferometric sensor and a strain resolution of 0.19 με with a measurement range of 6.28 mε was obtained for fiber Bragg grating sensors
Keywords :
calibration; demodulation; diffraction gratings; fibre optic sensors; frequency division multiplexing; light interferometers; optical modulation; optical resolving power; time division multiplexing; active remote demodulation; extended range; fiber Bragg grating sensors; fiber Bragg gratings; fundamental interferometric principle; high resolution; interferometric sensor; interferometric sensors; measurement range; passive sensors; periodic measurands; quasistatic measurands; self-calibration; single source; strain resolution; telemetry; Biomedical measurements; Bragg gratings; Dynamic range; Fiber gratings; Geologic measurements; Optical interferometry; Sensor arrays; Sensor phenomena and characterization; Telemetry; Temperature sensors;
Journal_Title :
Lightwave Technology, Journal of
