Patent ID: 7065119

Claim:
An electrooptic device including an optical waveguide having a longitudinal direction, two opposite ends and a central region, a region of an electrically conducting layer forming a contact layer applied to the length of the optical waveguide for conducting electrical current to the electrooptic device for driving it, wherein the contact layer extends over the optical waveguide up to said two opposite ends and has a substantially constant or uniform thickness, and the contact layer is connected to an electrically conducting path at a connection region and has a configuration or pattern in the plane of the electrically conducting layer to give an electric resistance between the connection region and areas at the optical waveguide which is higher for those of the areas which are located close to said two opposite ends than for those of the areas which are located at said central region, so that the contact layer has an electrical resistance varying in the longitudinal direction, the varying electrical resistance adapted to make the electrical power developed in or the gain inside the optical waveguide constant or uniform in the longitudinal direction.