Method and apparatus for incorporating a low contrast interface and a high contrast interface into an optical device
US6649990B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2002 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Mar 29, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/1215
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Methods and apparatuses for incorporating low contrast and high contrast interfaces in optical devices. In one embodiment an insulator is disposed proximate to a plurality of regions of a semiconductor including regions through which an optical beam is directed. High contrast interfaces are defined between the semiconductor and the insulator. Low contrast interfaces are defined between a doped region and the semiconductor. The optical beam is directed through the doped region from one of the plurality of semiconductor regions to another of the plurality of regions with relatively low loss. Optical coupling or evanescent coupling depending on an incident angle of the optical beam relative to the low contrast interface may occur through the doped region and low contrast interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.