Method and apparatus for channel detection
US6867852B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2003 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | Jul 11, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/077
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for the detection of optical channels in an optical signal and their reliable discrimination against optical amplifier noise includes splitting an input optical signal into two replicas separated by a delay and adjusting the delay such that a periodicity of the optical filter substantially matches the channel spacing of the input optical signal, such that the optical channels within the input optical signal are directed to a first output and noise within the input optical signal is divided between the first output and a second output. The method and apparatus further include determining a difference in power between the first output and the second output wherein the difference in power is an indication of the presence or absence of optical channels within the input optical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.