Write head mode optical mode converter using three-dimensional waveguide and dual-mode waveguide
US9047912B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2014 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Sep 22, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A write head includes a three-dimensional waveguide extending along a light-propagation direction. The three-dimensional waveguide is configured to receive light from a light source at a fundamental transverse electric (TE) mode. The three-dimensional waveguide includes an input coupler, a curved middle section, and a terminating end. The input coupler is tapered between the light source and the curved middle section. The write head includes a dual-mode waveguide extending along the light propagation direction and has an edge proximate to and separated from the curved section by a gap at a coupling region. The three-dimensional waveguide excites a higher-order TE mode in the dual-mode waveguide via the coupling region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.