HEAT-ASSISTED MAGNETIC RECORDING HEAD WITH AN INTEGRATED PHOTODIODE

A heat-assisted magnetic recording head includes a laser, a near-field transducer, a primary waveguide, a secondary waveguide, and a photodiode. The laser is configured to emit electromagnetic radiation. The near-field transducer is configured to focus and emit an optical near-field. The primary wav...

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Bibliographic Details
Main Authors Harvey, Christopher Neil, El Hallak, Fadi, Mohandas, Reshma Anamari, Olson, Scott Eugene, Goggin, Aidan Dominic, Howells, Bryn John, Gubbins, Mark Anthony
Format Patent
LanguageEnglish
Published 04.04.2024
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:A heat-assisted magnetic recording head includes a laser, a near-field transducer, a primary waveguide, a secondary waveguide, and a photodiode. The laser is configured to emit electromagnetic radiation. The near-field transducer is configured to focus and emit an optical near-field. The primary waveguide configured to receive the electromagnetic radiation and propagate the electromagnetic radiation toward and proximal to the near-field transducer. The secondary waveguide configured to receive a portion of the electromagnetic radiation from the primary waveguide. The photodiode configured to receive the portion of the electromagnetic radiation from the secondary waveguide and emit a signal that represents a magnitude of the electromagnetic radiation that the laser emits.
Bibliography:Application Number: US202318537957