It should be mentioned that the OSNR of these channels also increases with launching higher BP power. But when BP power continues to increase, it is noticed that the number of lasing lines will decrease. The generated number of desired channels is 6,6,5 and 4 when 0 dBm, 4 dBm, 8 dBm and 12 dBm BP power is injected, respectively. The reason is that high BP power causes the EDFA gain saturation and blocks occurrence of more cascaded SBS. As a result, the number of Stokes lasing lines decreases significantly. At the same time, we can also find that the power of 10 GHz sidebands decreases with respect to the main 20 GHz peaks for the higher BP power suppression.