Optical systems including add drop devices and methods
US6934473B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2003 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Jul 6, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0213
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Optical systems of the present invention include an add/drop device and/or cross-connect device, which is reconfigurable to add and drop signal wavelengths between one or more transmission paths. The add/drop device includes a first selective element configurable to pass a first group of signal wavelengths including at least a first signal wavelength from an input path to a first add/drop path and pass continuing signal wavelengths differing from the first group of signal wavelength to a second add/drop path. A second selective element is provided that is configurable to pass a second group of signal wavelengths including at least a second signal wavelength from said first add/drop path and continuing signal wavelengths differing from the second group of wavelengths from said second add/drop path to an output path. The second selective element is further configured to pass the second group of signal wavelengths from said second add/drop path and wavelengths differing from the second wavelength from said first add/drop path to a drop path. The add/drop device may also include an add path to introduce add signal wavelengths directly to the output path or via at least one of the first…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.