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:
Jul. 02, 2013
Filed:
Jul. 17, 2009
Enrico Griseri, Milan, IT;
Giovanni Osnago, Rovagnate, IT;
Mauro Brunella, Brugherio, IT;
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Techniques, in the form of an apparatus, logic and a method, are provided to set power levels for multiple Raman pump wavelengths in a distributed Raman amplification configuration in order to achieve a target gain and tilt or desired gain profile. A Raman pump light source is activated at each of a plurality of pump wavelengths and at each of a plurality of pump power levels such that only one pump wavelength at a given pump power level is active at a time to thereby amplify an optical probe signal in the optical fiber to produce an amplified probe signal. The level of the amplified probe signal at each of the pump power levels for the plurality of pump wavelengths is measured. The pump power level for each of the plurality of pump wavelengths is computed based on the measured levels of the amplified probe signals due to each of the pump power levels and at each of the pump power levels for the plurality of pump wavelengths.