Effect of stimulated Brillouin scattering on the gain saturation of distributed fiber Raman amplifier and its suppression by phase modulation

Zhang Yi-Chi^a),^b), Chen Wei^a),^b), Sun Shi-Lin^a),^b), Meng Zhou†^a),^b)

Theoretical and experimental plots of gain saturation power versus the power of forward Raman pump. Note: the numerical curve is not appropriate for the totally backward-pumped DFRA, owing to the fact that occurrence of SBS cannot make its gain saturate.