Patent ID: 11860414
Assignee: GLOBALFOUNDRIES U.S. INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. A structure for an edge coupler, the structure comprising:
a first dielectric layer including an edge;
a waveguide core region on the first dielectric layer, the waveguide core region having a tapered section with an end surface that terminates adjacent to the edge of the first dielectric layer; and
a second dielectric layer on the waveguide core region and the first dielectric layer, the second dielectric layer including a first trench and a second trench each positioned adjacent to the tapered section of the waveguide core region,
wherein the first trench has a first trench bottom, the second trench has a second trench bottom, the first dielectric layer includes a first section positioned beneath the first trench bottom, a second section positioned beneath the second trench bottom, and a third section positioned laterally between the first section and the second section, and the first section and the second section of the first dielectric layer comprise a dielectric material having a different refractive index than the third section of the first dielectric layer.