Data storage device adjusting laser input power to compensate for temperature variations
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United States of America Patent
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May 5, 2015
Grant Date -
N/A
app pub date -
Oct 8, 2014
filing date -
Oct 8, 2014
priority date (Note) -
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Abstract
A data storage device is disclosed comprising a head actuated over a disk, wherein the head comprises a laser configured to heat the disk while writing data to the disk. A temperature is measured, and a first input power is generated based on a first function of the measured temperature, wherein the first function compensates for a temperature dependent output power of the laser. A second input power is generated based on a second function of the measured temperature, wherein the second function compensates for a temperature dependent coercivity of the disk. The first input power is combined with the second input power to generate a write power applied to the laser while writing data to the disk.
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