Fiber Bragg grating (FBG) is a periodic perturbation of the refractive index along the fiber's length, formed by exposure of the coreto an intense optical interference pattern. The formation of permanent gratings in an optical fiber was first demonstrated in 1978 byHill et al. [1]. The application of optical fibers as sensors is on the rise due to their narrow diameter of approximately 125 μm and their capabilities of being embedded into materials and be multiplexed, which makes it possible to place multiple sensors in a singleoptical fiber. Specifically, FBG sensors are being increasingly used primarily because of their low intrusiveness, precision, and lowcost