Method of detecting the presence of cross-talk and apparatus therefor
US7400831B2 · kind B2 · utility
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2References
15Claims
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Key dates
| Filing date | Jun 12, 2003 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Apr 27, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A control loop detects the presence of cross-talk between first, second and third adjacent amplitude modulated wavelength division modulated channels of an optical communications system. A receiver including a demultiplexer, such as an Arrayed Waveguide Grating (AWG), receives portions of the energy in the channels to derive first, second and third electrical signals that are respectively replicas of the modulation of the first, second and third channels. Wavelength drift of the carried frequencies of the channels in detected by comparing the three signals in an electronic combinatorial logic unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.