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Disk drive comprising laser transmission line optimized for heat assisted magnetic recording

  • US 9,064,525 B2
  • Filed: 11/26/2013
  • Issued: 06/23/2015
  • Est. Priority Date: 11/26/2013
  • Status: Active Grant
First Claim
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1. A disk drive comprising:

  • a disk;

    a head comprising a laser configured to heat the disk while writing to the disk;

    at least one transmission line coupling a laser driver to the laser; and

    control circuitry configured to write data to the disk by pulsing the laser driver, wherein the transmission line comprises an impedance that results in a target pulse shape of optical power output by the laser,wherein the impedance of the transmission line is less than forty ohms and at least ten percent greater than an impedance of the laser.

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