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:
Sep. 21, 2004
Filed:
Sep. 20, 2001
Applicant:
Inventors:
Christian Döbler, Taufkirchen, DE;
Patrick Leisching, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/28 ; G02B 6/42 ; G02B 6/26 ;
U.S. Cl.
CPC ...
G02B 6/28 ; G02B 6/42 ; G02B 6/26 ;
Abstract
In a first ADD-DROP module, a WDM signal is supplied to a first filter arrangement which selects two channels and supplies the remaining channels to a cascading switching device. The channels selected by the first filter device can be dropped by an ADD-DROP switching device or switched through the module. The ADD channels switched through or newly added are combined with the remaining channels in an ADD filter arrangement to form a newly configured WDM output signal. A further ADD-DROP module (M ) which allows two further channels to be dropped and added can be connected, in turn, via cascading terminals.