Optical semiconductor waveguide switch
US5148505A · kind A · utility
14Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Apr 17, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/3138
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical switch includes at least one input optical semi-conductor waveguide. Two output optical semiconductor waveguides are connected at a branch point to the input optical waveguide, and diverge from the branch point with a preset angle .theta. (degree) between them. A refractive index controlling portion is located on at least one of the output optical waveguides and away from the branch point. The refractive index controlling portion effects a light mode cut-off by electromagnetically causing a reduction of the refractive index of the associated output optical waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.