On wafer laser stability control for heat-assisted magnetic recording

An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer that directs energy resulting from plasmonic e...

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Bibliographic Details
Main Authors Callan, Kelly Elizabeth, Mooney, Marcus B, Mehfuz, Reyad, El Hallak, Fadi, Goggin, Aidan Dominic, McElhinney, Paula Frances, Gubbins, Mark Anthony
Format Patent
LanguageEnglish
Published 23.06.2020
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer that directs energy resulting from plasmonic excitation to a recording medium. A light detector is configured to detect an amount of light. At least one laser heater is disposed proximate the laser. A controller is configured to control current supplied to the at least one heater based on the detected amount of light.
Bibliography:Application Number: US201816136389