Technology of Optical Bragg's Gratings on Planar Waveguides for Acoustooptic Applications

The aim of the presented investigations was to develop a technique of producing Bragg's gratings on planar waveguides for their application in acoustooptic structures. Waveguides are obtained by means of the sol-gel technology and they are deposited on piezoelectric plates. The introduction of a beam of light into the structure of the waveguide is in the case of planar or strip optical systems always an essential technical problem, requiring simple and reproducible solutions without excessive extending the waveguide structure. In the paper the technology of producing grating couplers by impressing the pattern of the network while forming the planar waveguide structure applying the sol-gel method was presented. The results of the investigations on grating couplers obtained in such a way have been discussed, too.