Multiple-core planar optical waveguides and methods of fabrication and use thereof
US7164838B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2005 |
| Grant date | Jan 16, 2007 |
| Priority date | — |
| Expiry date | Feb 15, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12147
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multiple-core optical waveguide comprises: a substrate; lower and upper waveguide core layers; a waveguide core between the upper and lower waveguide core layers; upper and lower cladding; and middle cladding between the upper and lower waveguide core layers substantially surrounding the waveguide core. Each of the lower, middle, and upper claddings has a refractive index less than refractive indices of the lower waveguide core layer, the upper waveguide core layer, and the waveguide core. Along at least a given portion of the optical waveguide, the upper and lower waveguide core layers extend bilaterally substantially beyond the lateral extent of a propagating optical mode supported by the optical waveguide, the lateral extent of the supported optical mode being determined at least in part by the width of the waveguide core along the given portion of the optical waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.