The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 2006
Filed:
Feb. 28, 2002
Andrea Galtarossa, Padua, IT;
Giuseppe Lorenzetto, Urbana, IT;
Luca Palmieri, Padua, IT;
Marco Santagiustina, Venice, IT;
Raoul Fiorone, Genoa, IT;
Andrea Corti, Cantu', IT;
Andrea Galtarossa, Padua, IT;
Giuseppe Lorenzetto, Urbana, IT;
Luca Palmieri, Padua, IT;
Marco Santagiustina, Venice, IT;
Raoul Fiorone, Genoa, IT;
Andrea Corti, Cantu', IT;
Marconi Communications SpA, Genoa, IT;
Abstract
An apparatus for compensation or emulation of polarization mode dispersion (PMD) effects occurring in an optical signal traveling over an optical fiber based link comprises controllable birefringence sections and devices for polarization conversion. Each section comprises birefringence optical members or parts thereof, and each section is followed or preceded by one of the controllable devices for polarization conversion. The birefringence sections are at least three in number, and at least one of these has a propagation delay different from that of the other sections. The apparatus comprises a detection device for PMD output and control of the controllable devices for feedback adjustment.