A new structure of planar difference interferometer has been proposed, constructed with the use of gradient waveguide and homogenous dielectric layer. The suggested structure provides much higher sensitiyity levels as compared to currently designed structures.
In the paper the diffracion gratings are presented. One presented the technolofy fabrication mathods of diffraction gratingd as wall as the possibility their applications. The diffraction gratings are very important elements for devices of integrated optics and integrated acoustics.
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The aim of the presented investigations was to develop a technique of producing Bragg's grating couplers on planar waveguides. Waveguides are obtained by means of the sol-gel technology. The introduction of a light beam 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 extending excessively the waveguide structure. The paper presents a technology of producing grating couplers by impressing the pattern of the network while forming the planar waveguide structure applying the sol-gel method. Some remarks concerning the sol-gel technology are also presented. The results of investigations on grating couplers obtained in such a way have been discussed, too. Attention has been drawn to the possibility of using such structures in optoelectronic sensors, particularly gas sensors, including sensors of water vapour as well as toxic gases.
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