Planar polarization rotator

摘要

An optical polarization rotator includes first and second optical waveguide ribs located along a planar surface of a substrate. The second optical waveguide rib is located farther from the surface than the first optical waveguide rib. First segments of the optical waveguide ribs form a vertical stack over the substrate, and second segments of the optical waveguide ribs are offset laterally in a direction along the planar surface. The first and second optical waveguide ribs are formed of materials with different bulk refractive indexes.

主权项

1. A method, comprising:
forming an optical layer over a first optical waveguide rib located along a planar surface of a substrate, the optical layer and first optical waveguide rib being formed of materials with different bulk refractive indexes; and etching the optical layer to form a second optical waveguide rib such that first segments of the optical waveguide ribs form a stack vertically oriented with respect to the planar surface and second segments of the optical waveguide ribs are relatively laterally offset along the planar surface; and wherein the method includes fabricating an optical polarization rotator including the optical waveguide ribs.