Planar focusing grating coupler
US7283705B2 · kind B2 · utility
11Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2004 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Mar 5, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/124
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is a planar focusing grating coupler, comprising: a light waveguide including a cladding layer and a core layer formed on a substrate and maintaining incident laser light in a single mode; and a focusing grating coupler formed to have a predetermined grating pitch at a certain area over the core layer, wherein the light using to the light waveguide forms a focal point with the grating layer in the direction perpendicular to the focusing grating coupler, whereby an ultra small pickup head for a mobile optical disk can be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.