Wavelength division multiplexed systems with optical performance monitors
US8027583B2 · kind B2 · utility
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2References
16Claims
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Assignee
Inventor
Key dates
| Filing date | Nov 21, 2008 |
| Grant date | Sep 27, 2011 |
| Priority date | — |
| Expiry date | May 26, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0227
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The specification describes optical performance monitors which are simplified by coupling single tunable optical filters to multiple channels being monitored. Optical measurements for more than one channel may be made simultaneously. The optical system architecture is preferably an optical performance monitor for a WDM system. In a system designed according to the invention n channels may be monitored using n photodetectors, n optical splitters, but only n/2 tunable optical filters. Additional system simplification may be obtained using optical switching elements coupled to the optical splitters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.