Optical switch, optical add-drop module, and optical communication system
US7046872B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2003 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | May 5, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/48
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This two input two output type optical switch includes four one input two output type optical switches which are arranged to oppose one another, each of these one input two output type optical switches including a Y branch portion in which one optical waveguide is branched into two optical waveguides. And two refractive index adjustment means are provided in the vicinity of each Y branch portion. Switching over of the optical path is performed by half of the refractive index adjustment means functioning alternately. Moreover, a light output intensity variable attenuation function which attenuates by any desired amount the intensity of the light which is being outputted is implemented, at some input port and/or output port, by operating at least one of the refractive index adjustment means which is not currently being used for switching over of the optical path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.