Pumping source having a number of pump lasers for Raman amplification of a WDM signal with the aid of minimized four-wave mixing

US7054058B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Harald Bock · Berlin, DE
• Richard Neuhauser · Neufahrn, DE

Key dates

• Filing date: Mar 11, 2002
• Grant date: May 30, 2006
• Expiry date: Jan 27, 2023

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/094096
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A pumping source for Raman amplification of an optical wavelength-division multiplex signal which has a number of pump lasers with different pumping wavelengths in each case. The pumping wavelengths are selected in such a way that mixing products from a four-wave mixing are minimized in or removed from the signal spectrum. Transmission bands for the channels of the WDM signal also can be defined in the signal spectrum such that the mixing products are situated between the transmission bands. Differences in the signal-to-noise ratios between the channels of the WDM signal on the basis of four-wave mixing are, therefore, efficiently minimized in the signal spectrum.