Method, apparatus and system for a re-configurable optical add-drop multiplexer
US7218857B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2003 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Mar 9, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0208
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A re-configurable optical add/drop apparatus separates an optical input signal into a first signal having a plurality of channels and a second signal having a plurality of channels and includes a channel router with drop ports, a wavelength-selective channel attenuator with a controllable polarization modulator, and an optical coupler. The channel router routes the selected channels of the first signal to the drop ports. The wavelength-selective channel attenuator selectively blocks some of the channels of the second signal to produce a third signal. The optical coupler couples the third signal with a fourth signal having a plurality of add channels to produce an optical output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.