Integriert-optischer Polarisator und Verfahren zu seiner Herstellung

The invention relates to an integrated optical polarizer which consists of a substrate along whose surface run strip-shaped optical waveguides produced by the diffusion of titanium, said optical waveguide having at least a proton-exchanged area on part of its length. The main feature of the invention is that the proton- exchanged area also runs on both sides of the titanium waveguide into the substrate and this area has a total width which is a multiple of the width of the waveguide, and is so designed that its depth in the area of the titanium waveguide is smaller than in the substrate on both sides of the waveguide. The invention also relates to a process for the production of such a polarize