Abstract:In the paper, a ring double-Brillouin-frequency spaced multi-wavelength Brillouin Erbium-doped fiber laser (MWBEL) based on non-linear amplified fiber loop mirror filter (AFMLF) was demonstrated, in which the non-linear amplified fiber loop mirror was used as a filter. At the 980nm pump power of 10.29dBm, the tunable laser source centre wavelength of 1563nm and power of -3dBm, up to 12 even output channels with 0.16nm spacing were achieved. And also the influences of 980nm pump power, the polarization controller and the tunable laser source centre wavelength on the number of Stokes light wave were studied.