Diffraction structure, diffraction grating, diffraction grating array, optical phased array, optical modulator, optical filter, laser source
US9939577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2017 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Apr 18, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2813
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A diffraction structure includes a supporting layer, a high refractive index layer, and a low refractive index layer. The high refractive index layer has a first refractive index, is formed above the supporting layer, configures a waveguide guiding input light input from an input terminal along a specific direction, and includes an opening section formed along the specific direction. The low refractive index layer has a second refractive index lower that the first refractive index, and is formed so as to cover the high refractive index layer and fill the opening section. The opening section modifies the input light in at least one of direction or speed according to a wavelength of the input light, and outputs the modified light as output light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.