Patent ID: 11921323
Assignee: CISCO TECHNOLOGY, INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. A device comprising:
a substrate having a first end and a second end;
first optical waveguides disposed in the substrate on a first layer between the first end and the second end; and
a second optical waveguide disposed in the substrate on a second layer, above the first layer, the second optical waveguide having a substantially rectangular shape with a long axis and a short axis, and being laterally centered over the first optical waveguides and longitudinally arranged between the first end and the second end with the long axis parallel to a line that bisects the first optical waveguides and extends between the first end and the second end,
wherein a gap between the first optical waveguides varies between the first end and the second end, and
wherein, in cross-section, at least a portion of a longitudinal edge of the second optical waveguide is aligned between longitudinal edges of a given one of the first optical waveguides.