Abstract

The paper presents a study devoted to the registration and analysis of experimental results obtained from fiber-optic sensors based on Bragg gratings embedded in samples made of various materials at the technological stage of their manufacture. As the materials into which the fiber-optic sensors were embedded, such polymeric materials as epoxy resin, poured plastic, thermoplastics used in 3D printing, as well as an important structural material - cement were considered. The evolution of the reflected spectra of fiber-optic sensors based on Bragg gratings and the measured resonant wavelength shift are shown during the technological processes of fabrication and under loading of finished samples in different directions relative to sensor orientation axis. The paper notes the features associated with the embedment of fiber-optic sensors in various materials, which must be taken into account to ensure the sensor integrity. Recommendations are given for the embedment of fiber-optic sensors into the material to improve the operability of the sensors.

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