Optical fiber transmission system

Abstract

The present invention relates to an optical fiber transmission system in which at least a first carrier signal, having a wavelength in a first spectral band, is transmitted, said system including an optical fiber, at least a first Raman amplifier module for launching into said optical fiber a first pumping signal at an appropriate wavelength for a stimulated Raman amplification of said first carrier signal, said first Raman amplifier module including first pumping means comprising two optical sources, a first of said optical sources emitting at said appropriate wavelength a linear beam along a first axis of polarization, a second of said optical sources emitting at said appropriate wavelength a linear beam along a second axis of polarization distinct from said first axis, first combination means arranged to combine said beams in order to provide said first pumping signal. The first Raman amplifier module also includes first polarization tuning means arranged to superimpose in real time at least one of said axes of polarization to a Polarization Dependant Loss axis.

Dependencies are inferred from the claim text.