HAMR recording head with external cavity laser using a near-field transducer as a reflector
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United States of America Patent
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Sep 6, 2022
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app pub date -
Jul 30, 2020
filing date -
Jul 30, 2019
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Abstract
A recording head includes an external cavity laser with an externally mounted part having an active region. The external cavity laser also includes a channel waveguide that delivers light towards a media-facing surface. A near-field transducer functions as a reflector, either alone or in combination with a Bragg grating in the channel waveguide. A reflective back facet of the externally mounted part and the reflector define a resonator of the external cavity laser.
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