The performances of the MBEFL for different 980 nm pump powers are illustrated in Fig.5 at 5 dBm BP power. With 980 nm pump power increasing, the spectrum of the Stokes lasing lines is more pronounced, and the number of lines increases correspondingly. Once the power increases to 130 mW, due to the strong oscillation of EDFL cavity modes, it is hard to increase the Stokes lasing lines by further increasing pump power.