Method and apparatus for improving spectral efficiency in wavelength division multiplexed transmission systems
US6342961B1 · kind B1 · utility
12Cited by
2References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2000 |
| Grant date | Jan 29, 2002 |
| Priority date | — |
| Expiry date | Aug 4, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A gain-clamped, optical amplifier includes a rare-earth doped fiber and a source of pump energy coupled to the rare-earth doped fiber. The doped fiber serves as a gain medium that is optically pumped by the pump source. A wavelength-selective optical feedback loop is coupled between input and output ports of the rare-earth doped fiber. The feedback loop supports a compensating laser signal, which is a pulsed signal located at a wavelength different from a signal wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.