Multi-stage fiber amplifier with flattened gain curves
US6473549B1 · kind B1 · utility
2Cited by
4References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 13, 2000 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Jun 13, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/003
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multi-stage optical amplifier for use in the transmission of optical signals over fiber when using Wavelength Division Multiplexing. Wavelength Division Multiplexing is particularly sensitive to differences in gain between channels and these differences become critical when cascaded fiber amplifiers are used to boost the signal over long distances. The present amplifier flattens the differences in gain and reduces noise figure by using multi-stage equalizing filters along the length of the transmission fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.