Patent ID: 6646776
Filing Date: 2003-11-11
Classification: G02F

Abstract:
An electro-optic device comprising:a substrate including an optical waveguide formed in an upper surface thereof; a plurality of electrically floating electrode segments that are positioned on the substrate to intensify an electric field in the optical waveguide; a plurality of electrically grounded electrode segments that are positioned on the substrate so that each of the plurality of electrically grounded electrode segments are separated from an adjacent one of the plurality of electrically grounded electrode segments by a predetennined distance, the plurality of electrically grounded electrode segments suppressing modal conversion and propagation or high order modes in the plurality of electrically grounded electrode segments and the plurality of electrically floating electrode segments, thereby suppressing modal coupling to the substrate that reduces high frequency loss in the substrate; a buffer layer formed on the substrate, the plurality of electrically floating electrode segments, and the plurality of electrically grounded electrode segments; and a driving electrode that is formed on the buffer layer, the driving electrode being adapted to receive an RF signal that induces the electric field in the optical waveguide.