Patent ID: 8909001

Claim:
An optical modulator comprising: a substrate having a thickness of 20 μM or less and an electro-optic effect; a reinforcing substrate holding the substrate thereon; and a resin layer disposed between the substrate and the reinforcing substrate, wherein an optical waveguide and a control electrode which controls light waves propagating through the optical waveguide are formed on the substrate, wherein the optical waveguide includes at least two optical waveguides separated from each other, wherein the control electrode disposed between the two optical waveguides is configured to include two electrodes, each one of said two electrodes being disposed along one of the two optical waveguides, and a thin line conducting the two electrodes at a same potential, wherein a width of each of the two electrodes disposed along the optical waveguides is ten times or less of a thickness of the substrate, and wherein no control electrode is disposed between the two electrodes disposed along the optical waveguides.