Patent ID: 8559777
Filing Date: 2013-10-15
Classification: G02F

Abstract:
1. An optical device comprising: a substrate; a dielectric film that is formed on the substrate and includes a first optical waveguide and a second optical waveguide that run parallel to each other; an insulating film formed on the dielectric film; a coplanar line that is formed on the insulating film and includes a signal line arranged between the first optical waveguide and the second optical waveguide, a first ground line arranged in a first region on a side of the first optical waveguide opposite the second optical waveguide, and a second ground line arranged in a second region on a side of the second optical waveguide opposite the first optical waveguide; and auxiliary electrodes that are arranged in the first region and the second region, are formed in contact with the dielectric film or within the insulating film, and apply bias voltages to the first optical waveguide and the second optical waveguide, wherein the auxiliary electrode arranged in the first region is an electrode to which a positive bias voltage is applied, and the auxiliary electrode arranged in the second region is an electrode to which a negative bias voltage is applied.