Hybrid Raman-erbium optical amplifier
US6665114B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2002 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Mar 9, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/302
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A hybrid optical signal amplifier is provided which includes the combination of a Raman amplifier and an EDFA assembly. The Raman amplifier has an output defined by regions of higher and lower gain levels, and the EDFA assembly has an output having a region, near the longer wavelengths thereof, that includes a maximum noise figure. The spectrum region of higher gain level of the Raman amplifier is selected to correspond to the spectrum region of the EDFA assembly that includes the maximum noise figure in order to lower the maximum noise figure of the resulting optical signal amplifier, as well as to flatten the gain across the output spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.