The purpose of the thesis is to study the use of optical fibers with Bragg grating (FBG) as vibration sensors. The Bragg gratings, as invested by a beam of light, only reflect a specific wavelength. However, this response is very sensitive to variations in the length of the Bragg segment, so that it is possible to use these sensors to perceive variation in length due to vibrations. During the thesis, it was shown that a fiber, placed on a suitable support, can fulfill the task of a regular vibration sensor. It has been tried to study whether the resonance of the fiber itself or of the supports could be exploited so as to have amplification peaks only at certain frequencies.