Patent ID: 11867945
Assignee: NOKIA SOLUTIONS AND NETWORKS OY
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An apparatus, comprising a photonic integrated circuit that comprises:
a substrate having a substantially planar main surface; and
an optical waveguide attached to the substrate adjacent and along said main surface, the optical waveguide including a waveguide core, wherein:
a first section of the waveguide core has a first edge whereat first and second surfaces of the waveguide core are connected to one another, the first surface being substantially orthogonal to said main surface, the second surface having a first nonzero lateral tilt angle with respect to said main surface; and
the first section of the waveguide core has a second edge whereat the first surface and a third surface of the waveguide core are connected to one another, wherein:
(i) the optical waveguide has a lower cladding between the first section of the waveguide core and the substrate, and the third surface has a second nonzero lateral tilt angle with respect to said main surface; or
(ii) the optical waveguide has no lower cladding between the first section of the waveguide core and the substrate, and the third surface is parallel to said main surface.