Silicon photonic device, optical polarisation beam coupler and optical waveguide coupler
US9810841B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2014 |
| Grant date | Nov 7, 2017 |
| Priority date | — |
| Expiry date | Jul 8, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12147
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A silicon photonic device (1) comprising: a silicon core (2) having a core refractive index; and a structure formed in the silicon core, comprising: a first refractive index variation pattern (4) across the core in a first direction (x) and having a first modulation depth (Hi); and a second refractive index variation pattern (6) across the core in a second, orthogonal, direction (y) and having a second modulation depth (H2), less than the first modulation depth. The first refractive index variation pattern overlays the second refractive index variation pattern, forming a three-dimensional structure. The first refractive index variation pattern only supports propagation of light having a TM mode between the first direction and a third direction (z) and the second refractive index variation pattern only supports propagation of light having a TE mode between the second direction and the third direction. An optical waveguide coupler is also disclosed. The optical waveguide coupler comprises a plurality of planar waveguides, each supporting propagation of one of a TE and a TM mode, and a plurality of silicon diffractive gratings each comprising a planar silicon core and a grating struct…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.