Optical transmission systems including optical switching devices, control apparatuses, and methods
US6771905B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2000 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Nov 24, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0016
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The optical systems of the present invention include optical switching device generally configured to control signal characteristic profiles over the pluralities of signal channels, or wavelengths, to provide desired signal characteristic profiles at the output ports of the device. Various signal characteristics that can be controlled include power level, cross-talk, optical signal to noise ratio, etc. The optical switching devices can include balanced demultiplexer/multiplexer combinations and switches that provide for uniform optical loss through the devices. In addition, low extinction ratio switches can be configured to provide higher extinction ratios.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.