Patent · US Expired

Method and polarization-multiplex system for reducing the signal degradation of an optical polarization-multiplex signal

US7672589B2 · kind B2 · utility

2Cited by

5References

23Claims

0Family size

Assignee

Nokia Siemens Networks GmbH & Co. KG · DE

Inventors

Erich Gottwald · Holzkirchen, DE
Nancy Hecker · Innsbruck, AT
Werner Paetsch · Birkenfeld, DE
Wolfgang Schairer · Birkenfeld, DE

Key dates

Filing date	May 6, 2003
Grant date	Mar 2, 2010
Priority date	—
Expiry date	Apr 18, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH04J14/06
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

Method for reducing signal degradation in an optical polarisation-multiplex system. The modulated optical signals to be transmitted are synchronised or generated such that the phase difference for NRZ-modulated signals is at least approximately 0° and the phase difference for RZ-modulated signals is at least approximately 180°. They can also be achieved by means of different synchronising devices.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.