Duplex wideband diffraction grating
US11566942B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2021 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Jul 29, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2001/2615
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A duplex wideband grating includes a first diffraction element and a second diffraction element. The first diffraction element and the second diffraction element may reside in a single volume or in two separate volumes. The first diffraction element may include a first set of Bragg planes, and the second diffraction element may include a second set of Bragg planes. The first diffraction element may be designed to have a peak diffraction efficiency at a first wavelength, and the second diffraction element may be designed to have a peak diffraction efficiency at a second wavelength different from the first wavelength. The first diffraction element and the second diffraction element may be designed to achieve a same angle of dispersion between wavelengths. The duplex wideband grating may have a broader bandwidth with higher average diffraction efficiency across the broader bandwidth than either the first diffraction element or the second diffraction element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.