Importance

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Abstract

An optical device has a first chip including a first waveguide and a first electrode, and a second chip mounted on the first chip and including a second waveguide and a second electrode. The second waveguide has an electro-optic effect higher than an electro-optic effect of the first waveguide and has a return structure that places an end of the second waveguide at an end face of the second chip. The second waveguide has been optically coupled to the first waveguide at the end face. The second electrode has a return structure that places an end of the second electrode at the end face, and the second electrode and the first electrode are electrically connected to each other in an area where the end of the second electrode has been placed.

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First Claim