Controlling laser output in a HAMR device
US9355671B2 · kind B2 · utility
7Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 2014 |
| Grant date | May 31, 2016 |
| Priority date | — |
| Expiry date | May 16, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of controlling laser output in a heat assisted magnetic recording device can be performed by control circuitry in a data storage device. The method includes measuring a temperature, measuring laser output power of a laser, determining a power error by subtracting an optimal laser output power from the measured laser output power and comparing the power error to at least one threshold to determine whether an applied current to the laser needs to be adjusted. The at least one threshold is related to how great the power error can be while maintaining the integrity of data on a recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.