Laser modulation for magnetic recording apparatus
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United States of America Patent
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Apr 19, 2016
Grant Date -
Oct 31, 2013
app pub date -
Mar 11, 2013
filing date -
Apr 25, 2012
priority date (Note) -
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Abstract
A transducer comprises a slider and a laser arrangement. The laser arrangement is configured to heat a region of a magnetic medium in proximity to the slider and produce modulated laser light to cause heat-induced modulation of the slider. The laser arrangement is configured to couple laser light at a power that reduces a coercivity of magnetic material at the region for writing data to or erasing data at the region, and couple modulated laser light to cause heat-induced modulation of the slider at a power lower than the power for writing data to or erasing data at the magnetic medium.
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