HEAT-ASSISTED MAGNETIC RECORDING HEAD WITH AN INTEGRATED PHOTODIODE

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Harvey, Christopher Neil, El Hallak, Fadi, Mohandas, Reshma Anamari, Olson, Scott Eugene, Goggin, Aidan Dominic, Howells, Bryn John, Gubbins, Mark Anthony
Format: Patent
Sprache:eng
Schlagworte:
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Beschreibung
Zusammenfassung: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.