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

Claim 18:
19. 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 nonzero lateral tilt angle with respect to said main surface
a second section of the waveguide core has a different nonzero lateral tilt angle, the first and second sections of the waveguide core being end-connected to one another; and
a third section of the waveguide core is untilted with respect to said main surface, the first and third sections of the waveguide core being end-connected to one another.