Invention Grant
- Patent Title: HAMR recording head with external cavity laser using a near-field transducer as a reflector
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Application No.: US16943124Application Date: 2020-07-30
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Publication No.: US11437068B1Publication Date: 2022-09-06
- Inventor: Vivek Krishnamurthy , Scott Eugene Olson , Tyler Lenn Perry , John Charles Duda
- Applicant: Seagate Technology LLC
- Applicant Address: US CA Fremont
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Fremont
- Agency: Mueting Raasch Group
- Main IPC: G11B5/39
- IPC: G11B5/39 ; G11B13/08 ; H01S5/028 ; H01S5/12 ; H01S5/0683 ; H01S5/14 ; G11B5/00

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.
Information query
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