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. 12, 2008
Filed:
Oct. 19, 2006
Dominique Annie Mongardien, Antony, FR;
Dominique Annie Mongardien, Antony, FR;
Alcatel, Paris, FR;
Abstract
A method of adjusting Raman gain in an optical amplifier assembly (). The method comprises inputting a plurality (N) of optical signals (OS) on different wavelength channels to a backward-pumped Raman active medium () pumped by means of a Raman pump source (). The proposed method is characterized in that a slope with respect to time in a quantity representative of a respective amplified optical signal (OS') on at least one existing/surviving channel is determined in case of channel add/drop, and in that the Raman pump source () is tuned depending on said change. In this way, fast and reliable Raman pump tuning can be achieved even in an optical amplifier assembly () and an optical transmission system, respectively, which suffer from channel adds/drops.