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:
Jun. 12, 2001
Filed:
Aug. 02, 1999
Dag Bonnedal, Enskede, SE;
Gunnar Forsberg, Stockholm, SE;
Bengt Johansson, Hägersten, SE;
Bo Lagerström, Skärholmen, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
The present invention relates to an optical system comprising firstly an optical amplifier (,), which comprises at least one input and at least one output, secondly a control circuit for regulating the output power of the amplifier (,) with the aid of a feed-forward process demand signal (PF), said control circuit comprising a feed-forward block (,) and a first means (,) for tapping light from the input of the amplifier (,) to the feed-forward block (,). According to the invention, the feed-forward block (,) is arranged to measure the total optical input power.