Patent ID: 8467634

Claim:
An optical device provided with first and second optical modulators formed on a substrate having electro-optical effect, wherein the first optical modulator comprises: a first optical waveguide; a first signal electrode to provide a first data signal for the first optical waveguide; and a first DC electrode, arranged at an output side of the first signal electrode, and to provide first DC voltage for the first optical waveguide, the second optical modulator comprises: a second optical waveguide; a second signal electrode to provide a second data signal for the second optical waveguide; and a second DC electrode provided, arranged at an input side of the second signal electrode, and to provide second DC voltage for the second optical waveguide, and wherein input portions of the first and second signal electrodes are arranged at a same side edge of the substrate an input portion of the second DC electrode is arranged between the input portions of the first and second signal electrodes.