Patent ID: 11966104
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical modulator comprising:
a substrate having a main surface including a first area and a second area;
an optical modulation portion disposed on the first area; and
an optical waveguide portion disposed on the second area,
wherein the optical modulation portion includes a first mesa waveguide and an electrode connected to the first mesa waveguide,
wherein the first mesa waveguide includes a p-type semiconductor layer disposed on or above the substrate, a first core layer disposed on the p-type semiconductor layer, and an n-type semiconductor layer disposed on the first core layer,
wherein the optical waveguide portion includes a second mesa waveguide,
wherein the second mesa waveguide includes a first cladding layer disposed on or above the substrate, a second core layer disposed on the first cladding layer, and a second cladding layer disposed on the second core layer,
wherein the second core layer is optically coupled to the first core layer,
wherein the first cladding layer contains a p-type dopant and protons, and
wherein the second cladding layer contains an n-type dopant.