Coupling grating for focusing light within a waveguide for heat assisted magnetic recording
US7171080B2 · kind B2 · utility
31Cited by
17References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 15, 2004 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Nov 15, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/124
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for focusing light within a waveguide is provided. The waveguide includes a curved grating adapted to focus light incident thereon to a focused spot proximate a first end of the waveguide. In another embodiment, the first end of the waveguide has a thickness greater than a portion of the waveguide containing the grating. The waveguide is suitable for focusing light onto a magnetic storage medium and the like, making the waveguide suitable for heat-assisted magnetic recording (HAMR) applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.