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:
Feb. 04, 2014
Filed:
Feb. 19, 2007
Stefan Gianordoli, Fürstenfeld, AT;
Lutz Rapp, Deisenhofen, DE;
Michael Rasztovits-wiech, Vienna, AT;
Andreas Stadler, Vienna, AT;
Stefan Gianordoli, Fürstenfeld, AT;
Lutz Rapp, Deisenhofen, DE;
Michael Rasztovits-Wiech, Vienna, AT;
Andreas Stadler, Vienna, AT;
Nokia Siemens Networks GmbH & Co. KG, Munich, DE;
Abstract
The invention relates to a bidirectional optical amplifier array (VA) which is preferably used in a passive optical network (PON) system, is disposed between a first line termination (OLT) and a second line termination (ONU), and is penetrated by an optical downstream signal (OSD) in one direction and an optical upstream signal (OSD) in the opposite direction. Said optical amplifier array is composed of a first part with two branching and combining units (Dand D), a unidirectional optical amplifier (E), and a transponder (T) in which the optical downstream signals and upstream signals (OSU and OSD) are separately amplified. The two signals (OSU and OSD) that run in opposite directions are amplified in a bidirectional amplifier (E) in a second part. A constant gain is maintained in the bidirectional optical amplifier (E) by means of the continuous downstream signal (OSD) such that the amplifier can be operated in stable conditions for the upstream signal (OSU) regardless of occurring bursts. In another embodiment, a splitter (S) is integrated into the inventive amplifier array (VA).