Method and system for grating couplers incorporating perturbed waveguides
US9091827B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2013 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Jul 8, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12107
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Methods and systems for grating couplers incorporating perturbed waveguides are disclosed and may include in a semiconductor photonics die, communicating optical signals into and/or out of the die utilizing a grating coupler on the die, where the grating coupler comprises perturbed waveguides. The perturbed waveguides may comprise a variable width along their length. The grating coupler may comprise a single polarization grating coupler comprising perturbed waveguides and a non-perturbed grating. The grating coupler may comprise a polarization splitting grating coupler (PSCC) that includes two sets of perturbed waveguides at a non-zero angle, or a plurality of non-linear rows of discrete shapes. The PSCC may comprise discrete scatterers at an intersection of the sets of perturbed waveguides. The grating couplers may be etched in a silicon layer on the semiconductor photonics die or deposited on the semiconductor photonics die. The grating coupler may comprise individual scatterers between the perturbed waveguides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.