Patent attributes
Structures for an edge coupler and methods of fabricating a structure for an edge coupler. A waveguide core includes a waveguide core section that has a first notched sidewall, a second notched sidewall, and an end surface connecting the first notched sidewall to the second notched sidewall. Segments are positioned with a spaced arrangement adjacent to the end surface of the waveguide core section, and a slab layer is adjoined to the segments, the first notched sidewall of the waveguide core section, the second notched sidewall of the waveguide core section, and the end surface of the waveguide core section. The segments and the waveguide core section have a first thickness, and the slab layer has a second thickness that is less than the first thickness.
