Method and system for grating couplers incorporating perturbed waveguides
View Patent ↗A system for grating couplers incorporating perturbed waveguides is disclosed and may include, in a semiconductor photonics die, communicating optical signals into and/or out of said semiconductor die utilizing a grating coupler on the semiconductor photonics die, where the grating coupler includes perturbed waveguides as scattering elements, and the perturbed waveguides comprise rows of continuous waveguides defined by non-discrete scatterers. The perturbed waveguides may include a variable width along a length of the perturbed waveguides. The grating coupler may include a single polarization grating coupler comprising perturbed waveguides and a non-perturbed grating, or a polarization splitting grating coupler including two sets of rows of perturbed waveguides at a non-zero angle from each other. The polarization splitting grating coupler may include discrete scatterers at an intersection of the two sets of rows of perturbed waveguides and/or may include non-linear rows of discrete shapes at an intersection of the perturbed waveguides.
1. A method for communication, the method comprising:
in a semiconductor photonics die:
communicating optical signals into and/or out of said semiconductor die utilizing a grating coupler on said semiconductor photonics die, wherein said grating coupler comprises perturbed waveguides as scattering elements, wherein the perturbed waveguides comprise rows of continuous waveguides defined by non-discrete scatterers.
2. The method according to claim 1 , wherein said perturbed waveguides comprise a variable width along a length of the perturbed waveguides.
3. The method according to claim 1 , wherein said grating coupler comprises a single polarization grating coupler comprising perturbed waveguides and a non-perturbed grating.
4. The method according to claim 1 , wherein said grating coupler comprises a polarization splitting grating coupler.
5. The method according to claim 4 , wherein said polarization splitting grating coupler comprises two sets of rows of perturbed waveguides that are at a non-zero angle from each other.
6. The method according to claim 5 , wherein said polarization splitting grating coupler comprises discrete scatterers at an intersection of said two sets of rows of perturbed waveguides.
7. The method according to claim 5 , wherein said polarization splitting grating coupler comprises a plurality of non-linear rows of discrete shapes at an intersection of said two sets of perturbed waveguides.
8. The method according to claim 1 , wherein said grating coupler is etched in a silicon layer on said semiconductor photonics die.
9. The method according to claim 1 , wherein said grating coupler is deposited on said semiconductor photonics die.
10. The method according to claim 1 , wherein said grating coupler comprises individual scatterers between said perturbed waveguides.
11. A system for communication, the system comprising:
a semiconductor photonics die comprising:
a grating coupler on said semiconductor photonics die, said grating coupler comprising perturbed waveguides as scattering elements and being operable to communicate optical signals into and/or out of said semiconductor die, wherein the perturbed waveguides comprise rows of continuous waveguides defined by non-discrete scatterers.
12. The system according to claim 11 , wherein said perturbed waveguides comprise a variable width along a length of the perturbed waveguides.
13. The system according to claim 11 , wherein said grating coupler comprises a single polarization grating coupler comprising perturbed waveguides and a non-perturbed grating.
14. The system according to claim 11 , wherein said grating coupler comprises a polarization splitting grating coupler.
15. The system according to claim 14 , wherein said polarization splitting grating coupler comprises two sets of rows of perturbed waveguides that are at a non-zero angle from each other.
16. The system according to claim 15 , wherein said polarization splitting grating coupler comprises discrete scatterers at an intersection of said sets of perturbed waveguides.
17. The system according to claim 15 , wherein said polarization splitting grating coupler comprises a plurality of non-linear rows of discrete shapes at an intersection of said two sets of perturbed waveguides.
18. The system according to claim 11 , wherein said grating coupler is etched in a silicon layer on said semiconductor photonics die.
19. The system according to claim 11 , wherein said grating coupler comprises individual scatterers between said perturbed waveguides.
20. A system for communication, the system comprising:
a semiconductor photonics die comprising:
a polarization splitting grating coupler on said semiconductor photonics die, said grating coupler comprising perturbed waveguides and discrete scatterers as scattering elements and being operable to communicate optical signals into and/or out of said semiconductor die, wherein the perturbed waveguides comprise rows of continuous waveguides defined by non-discrete scatterers.