Patents by Inventor Heidi M. Olson

Heidi M. Olson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Measuring transition shifts due to laser power variation in a heat-assisted magnetic recording device
    Patent number: 9818447
    Abstract: A method comprises writing a waveform on a magnetic recording medium using a heat-assisted magnetic recording apparatus which includes a laser. The method also comprises reading back the waveform from the medium, and detecting one or more transition shifts in the readback waveform indicative of a mode hop of the laser. The method further comprises measuring a metric of the one or more transition shifts.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: November 14, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Xuan Zheng, Walter R. Eppler, Julius K. Hohlfeld, Heidi M. Olson
  • Measuring transition shifts due to laser power variation in a heat-assisted magnetic recording device
    Patent number: 9620163
    Abstract: A method comprises writing a waveform on a magnetic recording medium using a heat-assisted magnetic recording apparatus which includes a laser. The method also comprises reading back the waveform from the medium, and detecting one or more transition shifts in the readback waveform indicative of a mode hop of the laser. The method further comprises measuring a metric of the one or more transition shifts.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: April 11, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Xuan Zheng, Walter R. Eppler, Julius K. Hohlfeld, Heidi M. Olson