Challenges of embedding fiber Bragg grating sensors in castable material: influence of the material shrinkage and fibers coatings on ultrasonic measurements

This dataset is linked to a paper on the feasibility of ultrasonic measurements with Fiber Bragg Grating (FBG) embedded in polyurethane resin samples. It combines data on the effect of resin on the reflectivity spectra of FBGs and ultrasonic measurements made with these same sensors. Initially, this measurement campaign was designed to determine which of several types of optical fiber (polyimide coating, acrylate coating, bend-insensitive, 7-core) was most suitable for insertion into polyurethane resin.