Patent ID: 6833947
Filing Date: 2004-12-21
Classification: H01S,H04B

Abstract:
An optical fiber transmission system comprising a first Raman amplifier module for launching into an optical fiber a first pumping signal for a stimulated Raman amplification of a first carrier signal having a wavelength in a first spectral band, said first Raman amplifier module comprising:first pumping means comprising a first optical source that emits a first linear beam along a first axis of polarization, and a second optical source that emits a second linear beam along a second axis of polarization distinct from said first axis, and first combination means arranged to combine said first and second beams in order to provide said first pumping signal, wherein said first Raman amplifier module comprises first polarization tuning means arranged to superimpose in real time at least one of said axes of polarization to a Polarization Dependant Loss axis.