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:
Nov. 19, 2002
Filed:
May. 04, 2001
Adalbert Bandemer, Dachau, DE;
Egbert Krause, Burgstadt, DE;
Tektronix Munich, GmbH, DE;
Abstract
The invention describes a system to compensate distortions caused by polarization modulation dispersion (PMD) in optical transmission systems and particularly transmission fibers, with a measuring device for distortions caused by PMD, an emulation unit for adjustable PMD values, a polarization transformation element, which adjusts the polarization of the signals coming from a transmission system to the PMD emulation unit, an analyzer and control unit, connected to the output signal of the measuring device, which unit controls the emulation unit and the polarization adjuster element. The invention is distinguished in that the emulation unit has a PMD emulator, which emulates PMD of second or higher order and matches PMD of a real transmission fiber as exactly as possible, and that the one or more PMD emulators compensate one or more transmission channels, and/or that the measuring device optically detects the PMD directly or by way of the detection of polarization conditions.