Back to results
US 9,536,555 B1Granted
Dual purpose bolometric sensor for heat-assisted magnetic recording device
AssigneeSeagate Technology LLC
InventorsJohn Charles Duda, James Gary Wessel
Life of this patent
Estimating the term…
Abstract
An apparatus comprises a slider and an optical waveguide formed in the slider and configured to receive light from a laser source. A near-field transducer (NFT) is formed on the slider at or near an air bearing surface (ABS) of the slider and optically coupled to the waveguide. A bolometric sensor is positioned proximate the NFT and exposed to at least some of the light. The bolometric sensor is configured to detect changes in output optical power of the laser source and contact between the slider and a magnetic recording medium.
Claims20
An apparatus, comprising:
- a slider;
- an optical waveguide formed in the slider and configured to receive light from a laser source;
- a near-field transducer (NFT) formed on the slider at or near an air bearing surface (ABS) of the slider and optically coupled to the waveguide;
- and
- a bolometric sensor positioned proximate the NFT and exposed to at least some of the light, the bolometric sensor configured to detect changes in output optical power of the laser source and contact between the slider and a magnetic recording medium.
2 more elements
An apparatus, comprising:
- a slider;
- an optical waveguide formed in the slider and configured to receive light from a laser source;
- a write pole at or near an air bearing surface (ABS) of the slider;
- a near-field transducer (NFT) formed on the slider at or near the ABS and optically coupled to the waveguide, the NFT positioned adjacent the write pole;
- and
- a bolometric sensor positioned proximate the NFT and exposed to at least some of the light, the bolometric sensor configured to detect changes in output optical power of the laser source and contact between the slider and a magnetic recording medium;
- wherein the bolometric sensor is situated at or immediately adjacent to a thermally actuatable region of the slider that includes the write pole and the NFT.
4 more elements
Dependencies are inferred from the claim text.