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US 9,495,984 B2Granted
Waveguide with reflective grating for localized energy intensity
AssigneeWestern Digital (Fremont), LLC
InventorsHongxing Yuan, Jinshan Li, Zhong Shi
Life of this patent
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Abstract
An apparatus includes a waveguide with first and second sections, and a junction coupling the first and second waveguide sections together. The first waveguide section has a first reflective device and the second section comprising a second reflective device arranged to generate a standing wave in the waveguide with maximum energy wave intensity at a target region of the waveguide in response to an incident energy wave being provided into at least one of the waveguide sections.
Claims8
A heat assisted magnetic recording (HAMR) apparatus, comprising:
- a waveguide comprising a cladding and a core, the core having a plurality of protrusions extending into the cladding;
- a near field transducer;
- an energy source arranged to propagate light through the waveguide to the near field transducer, and
- wherein the waveguide comprises first and second sections coupled together at a junction and wherein the waveguide is configured to optimize a normalized peak intensity of the light at a target region of the waveguide.
1 more element
A magnetic hard disk drive, comprising:
- a rotatable magnetic recording disk;
- a slider comprising a heat assisted magnetic recording (HAMR) device having a
- near field transducer (NFT);
- a waveguide comprising a cladding and a core, the core having a plurality of protrusions extending into the cladding;
- and
- an energy source arranged to propagate light through the waveguide to the near field transducer;
- wherein the NFT is arranged adjacent to the waveguide, the NFT configured to couple the light to the surface of the recording disk for heat assisted magnetic recording and wherein the waveguide comprises first and second sections coupled together at a junction and wherein the waveguide is configured to optimize a normalized peak intensity of the light at a target region of the waveguide.
4 more elements
Dependencies are inferred from the claim text.