The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2019
Filed:
Jul. 30, 2018
Seagate Technology Llc, Cupertino, CA (US);
Declan Macken, Eden Prairie, MN (US);
Tyler Lenn Perry, Cottage Grove, MN (US);
Karim Tatah, Eden Prairie, MN (US);
Andrei Dorobantu, San Diego, CA (US);
Todd Michael Lammers, Lafayette, CO (US);
Seagate Technology LLC, Cupertino, CA (US);
Abstract
A slider configured for heat-assisted magnetic recording includes a laser diode optically coupled to a waveguide of the slider. A power supply is coupled to the laser diode. A preamplifier is coupled to the power supply. The preamplifier is configured to monitor a forward voltage across the laser diode while operating the laser diode at a constant current during a write operation, detect a change in the forward voltage indicative of laser power instability, and generate a signal in response to detecting the forward voltage change.