SEMICONDUCTOR OPTICAL INTEGRATED ELEMENT AND MANUFACTURING METHOD THEREFOR

摘要

Provided is an semiconductor optical integrated element in which sequentially stacked on a substrate are at least a lower cladding layer, a waveguide core layer, and an upper cladding layer, wherein the following are provided: an embedded waveguide part having a structure in which a semiconductor cladding material is embedded near both ends of the waveguide core layer; and a mesa-type waveguide part having a waveguide structure in which a semiconductor layer which includes at least the upper cladding layer protrudes in a mesa-like shape. The thickness of the upper cladding layer in the embedded waveguide part is greater than the thickness of the upper cladding layer in the mesa-type waveguide part.