Optical spatial mode filter for removing fundamental mode components in a HAMR light path
US10061088B1 · kind B1 · utility
11Cited by
2References
20Claims
0Family size
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Key dates
| Filing date | Dec 5, 2017 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Dec 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A first waveguide portion receives light from an energy source in a fundamental transverse electric (TE00) mode. A mode converter converts a portion of the light to higher-order transverse electric (TE10) mode. A second waveguide portion receives the light at the TE10 mode and delivers the light to a near-field transducer that heats a recording medium in response thereto. An optical spatial mode filter prevents remnant light in the TE00 mode from affecting the recording medium while passing the light at the TE10 mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.