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)

Numerical results of on–off gain versus input signal power, obtained by PCM method. The inset shows the small signal gain.