Patents by Inventor Chad Robert Barry

Chad Robert Barry 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).

  • Laser mode hop detection in a heat-assisted magnetic recording device using a slider sensor and laser modulation
    Patent number: 10366722
    Abstract: An apparatus comprises a laser diode configured to generate modulated light during a write operation in response to receiving modulated current having a mean amplitude that varies or is constant. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A writer heater of the slider is configured to receive power during the write operation having a magnitude that varies or is constant. A sensor is situated on or within the slider. The sensor is configured to produce a sensor signal representative of output optical power of the laser diode. Measuring circuitry is coupled to the sensor and configured to measure a change in the sensor signal indicative of a laser mode hop during the write operation.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: July 30, 2019
    Assignee: Seagate Technology LLC
    Inventors: Riyan Mendonsa, James Dillon Kiely, Joshua Ward Christensen, Jon D. Trantham, Chad Robert Barry, Tim Rausch