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Data storage device modifying write operation when a laser mode hop is detected

  • US 9,972,344 B2
  • Filed: 07/24/2017
  • Issued: 05/15/2018
  • Est. Priority Date: 09/25/2014
  • Status: Active Grant
First Claim
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1. A data storage device comprising:

  • a first disk surface;

    a first head actuated over the first disk surface, wherein the first head comprises a laser configured to heat the first disk surface while writing data to the first disk surface; and

    control circuitry configured to;

    apply a write power to the laser and execute a first write operation to write first data to the first disk surface during a first revolution of the first disk surface;

    detect a first transient decrease in an output power of the laser during the first write operation; and

    when the first transient decrease in the output power of the laser is detected during the first write operation, execute a write-verify of the first data during a second revolution of the first disk surface.

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