Assistant waveguides for evaluating main waveguide coupling efficiency and diode laser alignment tolerances for hard disk
US9001628B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2014 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Mar 28, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A heat assisted magnetic recording (HAMR) transducer on a slider and including first and second opposing surfaces, wherein the first surface is aligned to an air bearing surface (ABS) of the slider and the second surface is aligned to a surface of the slider opposite the ABS, a target waveguide having an entrance at the second surface, the target waveguide being configured to direct energy provided by a light source from the entrance toward the first surface, wherein the target waveguide expands in cross-section area with distance from the entrance to form an inverse taper waveguide, a plurality of assistant waveguides each having an entrance at the second surface, wherein the plurality of assistant waveguides are configured to direct energy to the plurality of output devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.