Abstract: A composite waveguide termination structure including two different waveguide conductor geometries operatively located upon a common substrate, wherein each such waveguide geometry includes a ground conductor on the same surface of the substrate.

Abstract: An optical modulator comprises first and second optical waveguides having first and second electrodes respectively associated therewith, and an electrically conductive region associated with both waveguides. The electrodes have inputs for an electrical signal at input ends thereof, and outputs for the electrical signal at opposite output ends thereof. The conductive region is electrically connected to the output ends of the first and second electrodes such that an electric field created by the electrical signal between the first electrode and the conductive region is substantially equal in magnitude to an electric field created by the electrical signal between the second electrode and the conductive region. The balancing of the electric fields experienced by the waveguides enables the modulation of light in the two waveguides to be balanced.

Abstract: A composite waveguide termination structure including two different waveguide conductor geometries operatively located upon a common substrate, wherein each such waveguide geometry includes a ground conductor on the same surface of the substrate.