Our interests focus on the new theme of electro-optical modulator relevant to the development of domain-inverted LiNb03 waveguide technology. By means of the theory of dielectric planar optical waveguide, we have not only computed and drew the corresponding characteristic figures of domain-inverted LiNb03 waveguide electro-optical modulator with variable parameters, but also given the explanation of linear area involving input and output ports in theory. In addition, some improving and revising

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... thoughts about buffer layer and electrooptic efficiency of such modulator is done. We have experimented a lot mainly including steps of the domain-inverse poling techniques to validate the feasibility of making the smart structure of modulator.