Laser adjustment during field operation of a heat-assisted magnetic recording data storage device
US9589587B1 · kind B1 · utility
4Cited by
9References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2016 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Apr 11, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
During field operation of a heat-assisted magnetic recording data storage device, a laser adjustment procedure is performed. The laser adjustment procedure involves writing on a recording medium at least three tracks. If a bit error rate of a middle tracks has increased, the laser current is swept while recording test tracks to determine a new laser current that results in a minimum bit error rate. The new laser current is used for subsequent write operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.