Studium senzorických vlastností Braggovské mřížky v závislosti na různých hodnotách předepnutí

Abstract

Bachelor thesis deals with the sensory properties of Bragg grating used in vibration measurements. The aim was to check how Bragg grating responds when the pretension to vibration and with what sensitivity. The theoretical part is focused at grid description in general, their division and utilization in practice. It also contains methods of production. Furthermore, the reader is familiar with a laser sources and in more detail with the tunable lasers, as this optical source was used in experiment. In the practical part was at first measured the optical spectrum of Bragg gratings at different preloads. That experiment showed that the mechanical preload causes displacement spectra of several nanometers. Then was performed the measurement, in which was also verified the vibrational effect on the already biased grid.