Vibration registration system Introduction The bend of the fiber–optic wire (photos 1 and 2) begins to glow due to losses in the fiber. This is due to microscopic light leaks, when the total internal reflection is disrupted when the optical fiber is deformed when it is bent.Photo 1Photo 2Thanks to this phenomenon, we can identify the place where the bend occurs, which indicates the localization of unwanted vibrations. To enhance this effect, it would be useful to use multimode fiber. The bend...