Patent ID: 7529447

Claim:
An optical waveguide device comprising: a substrate body comprising an electro-optical material; an optical waveguide; and a signal electrode and a grounding electrode for applying a voltage on said optical waveguide, wherein said optical waveguide comprises a first primary area, a first curved area, a folding-back point, a first folding-back area provided between said first curved area and said folding-back point, a second primary area, a second curved area and a second folding-back area provided between said second curved area and said folding-back point, and wherein at least a part of said signal electrode is provided in a folding-back region extending from said first curved area and said second curved area to said folding-back point wherein at least a part of said first folding-back area is parallel with said signal electrode in said folding-back region and at least a part of said second folding-back area is parallel with said signal electrode in said folding-back region.