Identifying a polarization-mode dispersion event
US6781679B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2002 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Nov 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2569
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system identifies a polarization-mode dispersion (PMD) event in an optical fiber by determining error conditions in proximate wavelengths. The system includes an optical interface and a PMD identification system. The optical interface receives an optical signal from the optical fiber wherein the optical signal is wavelength division multiplexed with a plurality of wavelengths. The PMD identification system determines whether a first error condition exists in a first one of the wavelengths of the optical signal. The PMD identification system also determines whether a second error condition exists in a second one of the wavelengths of the optical signal wherein the second one of the wavelengths is proximate to the first one of the wavelengths. The PMD identification system also determines whether an acceptable condition exists in a third one of the wavelengths of the optical signal that is not proximate to the first one and the second one of the wavelengths of the optical signal. The PMD identification system then determines the presence of the polarization-mode dispersion event in the optical fiber based on the first error condition, the second error condition, and the acceptable …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.