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:
Oct. 26, 2004
Filed:
Sep. 16, 2002
Zhan Gao, München, DE;
Reinhold Noé, Paderborn, DE;
Infineon Technologies AG, Munich, DE;
Abstract
An optical signal alternately traverses a total of n couplers and n−1 DGD units, arranged therebetween, with a differential group delay between two signal modes. The power division between the two signal modes is measured in each DGD unit in a power division controller, and a signal that is proportional to the difference between the powers in the two signal modes is obtained. The signal is led to an integrating controller whose control signal is led to a differential phase shifter that is accommodated in the DGD unit present upstream in the beam path. The difference between the powers of the two signal modes is thereby brought to zero at least approximately. This has the consequence that it is essentially only the chromatic dispersion that is generated or equalized, but no other disturbing distortions of the optical signal are produced.