Simultaneous Strain and Temperature measurement using Combined Fiber and Fiber Bragg Grating sensors

Hedi Bellil,
Institut Superieur des Etudes Technologiques en Communications de Tunis, Tunis

Mustafa A.G. Abushagur,
The University of Alabama in Huntsville Department of Electrical and Computer Engineering,
Huntsville, Alabama, United States

DOI: 10.36724/2664-066X-2021-7-3-6-10

SYNCHROINFO JOURNAL. Volume 7, Number 3 (2021). P. 6-10.


We propose here a new technique for simultaneous strain and temperature measurement using a Fiber Bragg Grating sensors. This technique employs an interferometric detection using two Fiber Bragg Gratings. A fiber Bragg grating is used as a reference while another fiber Bragg grating and a length of a bare fiber are used as the two sensing elements. As the temperature and strain change, the length of the sensing elements, (Fiber and Fiber Bragg Grating) change. These changes result in a phase and wavelength shifts. To measure these effects we use a Folded Mach Zhender interferometer, and a detection system made out of two photodiodes and data processing system. The sensitivity and dynamic range are analyzed and presented.

Keywords: Fiber Bragg Grating sensors, optical fiber sensors, wavelength detection.


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