VCSEL Array For HAMR
AssigneeWestern Digital Technologies, Inc.
InventorsBarry C. STIPE, Takuya MATSUMOTO, Sergei SOCHAVA
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Abstract
The present disclosure relates to pretreating a magnetic recording head for magnetic media drive. For a heat assisted magnetic recording (HAMR) head, a light source provides the necessary heat for the drive to operation. A vertical cavity surface emitting laser (VCSEL) is mounted to a top surface of a slider. A plurality of laser beams are emitted from the bottom surface of the VCSEL and directed to a corresponding number of waveguide structures within the HAMR head. The waveguide structures feed into a multimode interference (MMI) device that then directs the laser into a single waveguide for focusing on a near field transducer (NFT). The VCSEL lasers are phase coherent and have no mode hopping.
Claims20
A magnetic media drive, comprising:
- a magnetic recording head, wherein the magnetic recording head comprises:
- a near field transducer (NFT) at a media facing surface (MFS);
- a waveguide structure extending between the NFT and a first surface opposite the MFS;
- and
- a vertical cavity surface emitting laser (VCSEL) device coupled to the first surface, wherein the VCSEL device includes a second surface facing the first surface, wherein the VCSEL device is capable of emitting a plurality of lasers through the second surface;
- and
- a magnetic media facing the MFS.
A magnetic media drive, comprising:
- a magnetic recording head, wherein the magnetic recording head comprises:
- a near field transducer (NFT) at a media facing surface (MFS);
- a waveguide structure extending between the NFT and a first surface opposite the MFS, wherein the waveguide structure comprises a multimodal interference (MMI) device that is disposed between the NFT and the first surface;
- a plurality of laser apertures disposed in the first surface;
- and
- a vertical cavity surface emitting laser (VCSEL) device coupled to the first surface, wherein the VCSEL device includes a second surface facing the first surface, wherein the VCSEL device is capable of emitting a plurality of lasers corresponding to the plurality of laser apertures.
A magnetic media drive, comprising:
- a magnetic recording head, wherein the magnetic recording head comprises:
- a near field transducer (NFT) at a media facing surface (MFS);
- a vertical cavity surface emitting laser (VCSEL) device coupled to a first surface opposite the MFS, wherein the VCSEL device includes a second surface facing the first surface, wherein the VCSEL device is capable of emitting a plurality of lasers through the second surface, and wherein the plurality of lasers emitted by the VCSEL device are phase coherent;
- and
- a waveguide structure extending between the NFT and the first surface, wherein the waveguide structure comprises means for combining a power of the plurality of lasers emitted by the VCSEL device.
Dependencies are inferred from the claim text.