Method for the reduction of noise in a long-distance optical telecommunications system
US6538788B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Jan 16, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2525
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system for providing noise reduction in a long-distance telecommunications system is disclosed. A transmitter generates an optical signal. An optical link includes an optical amplifier that transmits the optical signal in a pre-established direction of propagation with substantially compensated dispersion to have an associated optical noise. A receiver is configured to receive a noisy optical signal including the transmitted optical signal and an optical noise signal. The receiver includes a photodetecting device that is configured to generate an electronic signal correlated with the noisy optical signal. The electronic signal being associated with a quality parameter (Q) that depends on said optical noise signal and distortion of the optical signal in the optical link. The optical link further includes a dispersive and nonlinear filtering device that has a normal dispersion and nonlinear component. The filtering device is placed along said optical link and has an associated normal dispersion parameter &bgr;2,NORM•L and a nonlinearity parameter &ggr; operatively selected so as to increase the quality parameter by at least 1 dB.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.