Output stage for carrying out WDM message transmission and methods for exchanging full light sources in an output stage of this type
US7822345B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 2004 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Aug 17, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0221
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An output stage for WDM information transmission transmits a plurality of carrier waves modulated by an information signal and a filling lightwave. A first control circuit controls a desired power signal which determines the power of the filling light source so that the total power of carrier and filling lightwaves detected by a photodetector is held constant at a predetermined reference level. The filling light source is part of an assembly which is replaceably mounted at a first mounting location of the output stage. At a second mounting location of the output stage a second assembly comprising a second filling light source is mounted or adapted to be mounted. An auxiliary circuit is adapted to provide one of the two filling light sources with a continuously decreasing second desired power signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.