Patent ID: 7848013

Claim:
An optical fiber amplifier pumping system based on multiple stimulated Raman scattering (SRS) for optical communication systems, comprising: an optical fiber amplifier; and at least one pump for generating a plurality of pump signals with increasing wavelengths for injection into a transmission fiber having a cut-off frequency, the wavelengths of the pump signals being such that, in cascade, of each pair with successive wavelengths of the plurality of pump signals, the pump signal with longer wavelength is amplified by the pump signal of shorter wavelength immediately below, the pump signal with the shortest wavelength having a power greater than a power of the pump signal with the longest wavelength and having a wavelength shorter than the cut-off frequency of the transmission fiber so as to propagated in a multimode manner, and the pump signal of the longest wavelength being arranged to pump the optical fiber amplifier which is located remotely from the at least one pump.