Optical waveguide, and thermally-assisted magnetic recording head including the same
US8170389B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2011 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Jan 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical waveguide includes a core and a clad. The core includes first to third propagation parts, and a coupling part that couples the first to third propagation parts together. The first propagation part has a first incidence end face on which part of incident light is incident, and a first emission part that emits first propagation light. The second propagation part has a second incidence end face on which another part of the incident light is incident, and a second emission part that emits second propagation light. In the coupling part, a first light wave resulting from the first propagation light and a second light wave resulting from the second propagation light occur, and the first and second light waves interfere with each other to generate third propagation light to be emitted from a third emission part. The third propagation part propagates the third propagation light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.