Transient control in optical transmission systems
US7251071B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2004 |
| Grant date | Jul 31, 2007 |
| Priority date | — |
| Expiry date | Dec 3, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0213
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In an optical transmission system, operations of certain elements are adjusted in an individualized manner after detecting a change in the total optical power level corresponding to multiple optical channels in a link of the system in order to control transients in those channels. For example, in response to a sudden drop in the number of channels resulting from a fiber cut, the power levels of the optical pumps in a Raman amplifier in an OADM are adjusted to reduce transient gain errors in the surviving channels, where the adjustment to the pump power level for each different optical pump is a function of both the detected change in the total optical power level and at least one specified coefficient for that particular optical pump, in order to handle non-linearities in the response of the Raman amplifier to the sudden drop in the number of optical channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.