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:
Mar. 16, 2004
Filed:
Mar. 15, 2002
Peter Krummrich, Munich, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A pump source for broadband amplification of a wavelength-division multiplexed signal transmitted via an optical fiber having a number of low-power pump lasers, whose input signal power levels are increased in a conversion fiber. One or more high-power lasers such as Raman cascade lasers on the one hand, and one or more monomode laser diodes with a low output power, on the other hand, are used as the pump lasers. Pump signals from the monomode laser diodes are subjected to Raman amplification in the conversion fiber before providing broadband amplification of the WDM signal in the transmission fiber by stimulated Raman scatter. The powers required for the amplified pump signals at the output of the conversion fiber are achieved by respective pump power increases in the pump signals of the monomode laser diodes, and by using monomode laser diodes with different output powers, as well as via a corresponding arrangement of the input coupling of the output signals of the pump lasers into the conversion fiber.