Patent ID: 8594477

Claim:
An optical waveguide device that includes an optical waveguide formed from an optical waveguide formation layer that comprises a lower clad layer, a core layer and a plurality of upper clad layers formed on a substrate, and that includes an optical element mount on which optical elements are mounted in an area where a part of said optical waveguide formation layer is removed, at least one optical element from among said optical elements being optically coupled to an end face of said optical waveguide exposed by removing said part of the optical waveguide formation layer, wherein said optical element mount comprises: a first base block that supports a first optical element that is one optical element from among said optical elements; and a second base block that supports a second optical element that is one optical element of said optical elements, said second optical element having an active layer depth smaller than that of said first optical element, and wherein said second base block is formed from the plurality of upper clad layers having a number larger than a number of one or more of the plurality of upper clad layers of said first base block, and a difference in height between said first and second base blocks is equal to a difference in the active layer depth between said first and second optical elements.