Turning grating device for emission of arbitrary optical beam profiles from waveguides into two-dimensional space
US12321011B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2021 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Apr 4, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12107
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A turning grating coupler device comprises a waveguide core layer including a grating structure and an output slab adjoined with the grating structure. The grating structure comprises an array of sub-waveguides substantially parallel to each other along a first propagation direction. Each of the sub-waveguides has opposing sidewalls, and a width of each sub-waveguide is defined by a distance between the sidewalls. The width of each sub-waveguide is varied such that each of the sidewalls has a periodic structure that produces a sidewall periodic modulation that is out of phase with respective sidewall periodic modulations of adjacent neighboring sub-waveguides. An input edge is configured to receive a light beam from a source and direct the beam into the array of sub-waveguides in the first propagation direction. The sub-waveguides are configured to diffract the beam into the output slab in a second propagation direction substantially perpendicular to the first propagation direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.