Multiplexer with aptical add/drop
US7869713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2005 |
| Grant date | Jan 11, 2011 |
| Priority date | — |
| Expiry date | Jun 3, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0223
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of extracting a predetermined channel from an OTDM signal includes the steps of combining at the inlet of an SOA the OTDM signal and an impulsive signal with impulses temporally synchronized with the channel to be extracted to produce in the SOA FWM, XGM and XPM effects which shift to a length c the channel chosen for extraction with c outside the length d of the OTDM signal with the other channels outlet from the SOA and filtering the SOA outlet to extract components with c d that represent respectively the desired channel and the cleaned OTDM signal. A multiplexer in accordance with the method includes an inlet (14) of an OTDM signal sent to an SOA (24) together with an appropriate impulsive signal. The SOA outlet is filtered by filters (28, 29) to obtain the signal of the extracted channel (16) and the cleaned OTDM signal (15).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.