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:
Apr. 08, 2008
Filed:
Feb. 18, 2004
Jörg Eberlein, Wolfratshausen, DE;
Christian Eder, München, DE;
Alexander Richter, München, DE;
Robert Schimpe, Ottobrunn, DE;
Jörg Eberlein, Wolfratshausen, DE;
Christian Eder, München, DE;
Alexander Richter, München, DE;
Robert Schimpe, Ottobrunn, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
According to the invention, in add-drop devices of an optical cross-connect device for wavelength multiplex signals, tributary drop signals to be dropped are pre-selected in the drop branch by means of pre-selection elements. Only these signals are amplified, thus reducing the number and/or power of the optical amplifiers. The tributary drop signals are individually selected by means of drop routing elements and adjustable filters. The add branch is created correspondingly.