Determining waveguide positions and angles for efficient reflective coupling
US6470109B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Nov 30, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/3576
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An efficient optical coupling arrangement of waveguides is achieved by providing compensation for the Goos-Hänchen effect along a total internal reflection interface. In one embodiment, the lateral shift of reflected light along the interface is calculated in order to determine a distance between axes of two waveguides. The spacing between the axes may be calculated to maximize coupling of light having a transverse electric polarization or light having a transverse magnetic polarization. Preferably, the spacing between axes is established to minimize polarization dependent loss. In another embodiment of the invention, the incidence angles of the two waveguides are selected on the basis of achieving equal lateral shifts of the two polarizations, so that polarization dependent loss is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.