Distortion analyzer
US6411750B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2001 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Nov 29, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2569
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A distortion analyzer for generating a distortion signal based on an input signal. For example, the distortion signal may be generated by adding a first signal corresponding to the entire spectrum of the input signal to a second signal corresponding to a low-frequency component of the input signal and then subtracting from the result of addition a third signal corresponding to a specific frequency band of the input signal. The effect of polarization mode dispersion that an optical signal experiences as it propagates through an optical transmission fiber may be compensated for at a receiver using a birefringent compensator, in which the distortion analyzer continuously examines the signal outputted by the compensator and supplies the distortion signal to the compensator, which causes the compensator to reduce the effect of such polarization mode dispersion based on the level of the distortion signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.