Invention Grant
- Patent Title: Heat assisted magnetic recording writer having integrated polarization rotation waveguides
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Application No.: US14752482Application Date: 2015-06-26
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Publication No.: US09646639B2Publication Date: 2017-05-09
- Inventor: Derek A. Van Orden , Sergei Sochava , Jianwei Mu , Ge Yi
- Applicant: Western Digital (Fremont), LLC
- Applicant Address: US CA Fremont
- Assignee: WESTERN DIGITAL (FREMONT), LLC
- Current Assignee: WESTERN DIGITAL (FREMONT), LLC
- Current Assignee Address: US CA Fremont
- Agency: Foley & Lardner LLP
- Main IPC: G02B6/42
- IPC: G02B6/42 ; G11B5/48 ; G11B5/17 ; G11B5/60 ; G02B6/122 ; G11B5/00

Abstract:
A heat assisted magnetic recording (HAMR) writer is described. The HAMR writer is coupled with a laser that provides energy having a first polarization state. The HAMR writer has an air-bearing surface (ABS) configured to reside in proximity to a media during use, a plurality of waveguides, a main pole and at least one coil. The main pole writes to the media and is energized by the coil(s). The waveguides receive the energy from the laser and direct the energy toward the ABS. The waveguides include an input waveguide and an output waveguide. The input waveguide is configured to carry light having the first polarization state. The output waveguide is configured to carry light having a second polarization state different from the first polarization state. The waveguides are optically coupled and configured to transfer the energy from the first polarization state to the second polarization state.
Public/Granted literature
- US20160379677A1 HEAT ASSISTED MAGNETIC RECORDING WRITER HAVING INTEGRATED POLARIZATION ROTATION WAVEGUIDES Public/Granted day:2016-12-29
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