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:
Sep. 14, 2004
Filed:
Oct. 15, 2002
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
An amplifier arrangement includes an optical amplifier ( ) with a source of injected power ( ) for controlling amplifier gain. A feed forward gain control loop is provided with a weighting arrangement ( ) capable of weighting the signal power at selected wavelengths input to the amplifier. In this way non-uniform spectral gain of the amplifier may be compensated for by selecting appropriate weighting factors. Thus the influence of wavelengths having a greater than average impact on the decay rate of the excited population within the amplifier is increased and vice versa. By tailoring the weighting arrangement to the specific class of amplifier utilised, and possibly to a specific amplifier within a class, amplifier gain can be precisely controlled and traffic signal power reliably held at a constant level regardless of link configuration changes.