Laser modulation for magnetic recording apparatus

摘要

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.

主权项

1. An apparatus, comprising:
a transducer;an air bearing defined between the transducer and a magnetic medium; and
a laser arrangement configured to cause heat-induced modulation of a component of the transducer, wherein the laser arrangement comprises a laser configured to produce modulated laser light at a frequency that mechanically excites the component at a resonant frequency and at a power lower than a power for writing data to or erasing data at the magnetic medium.