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:
Aug. 10, 2004
Filed:
May. 28, 1998
Thomas Pfeiffer, Stuttgart, DE;
Alcatel Alsthom Compagnie Generale d'Electricite, Paris, FR;
Abstract
A receiver (EMP , . . . , EMPn) is disclosed for receiving optical signals from an optical transmission network (NET) serving to transmit coded, multiplexed optical signals. The receiver (EMP , . . . , EMPn) includes a means (DEK ) for detecting the optical signals to be received, e.g., a Fabry-Perot filter, and processing means (O/E1, 0/E2, 5) to compensate noise present in the detected optical signals by combining the detected optical signals with compensation signals. The means (DEK ) is adapted to transmit optical signals to be received and reflect optical signals not to be received. A further means (K ), e.g., an optical coupler, is provided for deriving the compensation signals from at least part of the reflected optical signals and then applying the compensation signals to the processing means (O/E1, O/E2, 5). The receiver has the advantage that the signal to be received is not contained, or is contained only minimally, in the compensation signal, so that it does not affect, or affects only insignificantly,the degree of compensation when being combined with the detected signal.