Method and contrivance for applying a Raman amplification in a transmission and/or fibre device

摘要

Raman amplification is used in optical transmission systems, devices and/or components. An object of the invention is to provide a new and improved way of proceeding for applying Raman amplification avoiding or suppressing detrimental and hence undesirable non-linear effects when applying Raman amplification to respective optical devices. The invention proposes to apply Raman amplification in an optical device by firstly determining a pump power (3) necessary for providing Raman amplification and then by providing a low spectral power density by pumping the optical device with pump power (3) at a relatively broad pump power spectrum and preferably a low spectral pump power amplitude such that the total output pump power (3) remains sufficiently high.