Looped optical network with ASE light recirculation and link and network survivability control system
US7417790B2 · kind B2 · utility
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5References
20Claims
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Key dates
| Filing date | Sep 10, 2004 |
| Grant date | Aug 26, 2008 |
| Priority date | — |
| Expiry date | Sep 10, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/275
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A looped WDM optical network comprises an optical loop with optical amplifiers (12,16) between the sections of the loop (11) and with ASE recirculation in the loop. At a point of the loop a laser beam is injected and allowed to circulate in the loop with the laser beam being centered around a λLINK wavelength where it is desired that a lasing peak be generated. This supplies high network strength in terms of section loss variations and greatly improves the OSNR of the WDM signal. High network survivability is also achievable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.