Semiconductor optical component utilizing leaky structures to match the mode of rib waveguides to that of the fiber
First Claim
1. A waveguide component having:
- a slab waveguide, the slab waveguide including lateral confinement waveguides a rib waveguide, and a mode transition section, wherein the rib waveguide and the slab waveguide are adjacent, wherein the rib waveguide is tapered, to provide optical coupling, and wherein the lateral confinement waveguides are provided along the slab waveguide in the mode transition section to confine light from spreading laterally.
2 Assignments
0 Petitions
Accused Products
Abstract
A waveguide component has a slab waveguide, a rib waveguide, and a mode transition section where the rib waveguide and the slab waveguide are adjacent, and where the rib waveguide is tapered, to provide optical coupling, and lateral confinement rib waveguides are provided along the slab waveguide in the mode transition section to confine light from spreading laterally. The lateral confinement ribs can be formed in the same step with the same mask as used for the taper, to ensure alignment with the taper. They can be arranged either side of the taper. The lateral confinement ribs are significant for enabling a mode transition section which couples with low loss. In particular, it reduces the need for the taper to be so fine, or the taper to be made in both vertical and horizontal axes, both of which cause fabrication difficulties.
-
Citations
21 Claims
-
1. A waveguide component having:
-
a slab waveguide, the slab waveguide including lateral confinement waveguides a rib waveguide, and a mode transition section, wherein the rib waveguide and the slab waveguide are adjacent, wherein the rib waveguide is tapered, to provide optical coupling, and wherein the lateral confinement waveguides are provided along the slab waveguide in the mode transition section to confine light from spreading laterally. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
13. A tapered rib waveguide, comprising:
-
a substrate;
a slab waveguide horizontally formed on said substrate;
a tapered rib formed on said slab waveguide;
two sets of rib waveguides formed on said slab waveguide longitudinally surrounding said tapered rib along a finite part of the length of said tapered rib and formed in the same fabrication step as said tapered rib.
-
Specification