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.
Claims21
A slider, comprising:
- a body;
- a plurality of bonding pads studs disposed on the body;
- a plurality of spot size converters extending from a first surface of the body, the plurality of spot size converters having a first end disposed adjacent to the first surface of the body, wherein the plurality of spot size converters are disposed between at least two adjacent bonding pad studs of the plurality of bonding pad studs;
- a multimodal interference (MMI) device coupled to a second end of the plurality of spot size converters;
- and
- a vertical cavity surface emitting laser (VCSEL) device mounted on the first surface of the body, wherein the VCSEL device has a plurality of laser apertures that align with the plurality of spot size converters.
A magnetic recording head assembly, comprising:
- a slider comprising a body;
- a vertical cavity surface emitting laser (VCSEL) device mounted on a first surface of the slider body, wherein the VCSEL device is capable of emitting a plurality of lasers;
- a plurality of spot size converters extending from the first surface of the slider body, the plurality of spot size converters having a first end disposed adjacent to the first surface of the slider body, wherein a total number of the plurality of spot size converters matches a total number of the plurality of lasers emitted by the VCSEL device;
- and
- a multimodal interference (MMI) device having a first end coupled to a second end of the plurality of spot size converters.
A slider, comprising:
- a body;
- a plurality of spot size converters extending from a first surface of the body, the plurality of spot size converters having a first end disposed adjacent to the first surface of the body, wherein the plurality of spot size converters are linearly aligned;
- a multimodal interference (MMI) device having a first end coupled to a second end of the plurality of spot size converters;
- and
- a vertical cavity surface emitting laser (VCSEL) device mounted on the first surface of the body via first contact and a second contact, wherein:
- the VCSEL device is capable of emitting a plurality of lasers through the plurality of spot size converters to the MMI device,
- the plurality of lasers are phase coherent, and
- the MMI device combines a power of the plurality of lasers.
Dependencies are inferred from the claim text.