By optimizing the various parameters of the Er-doped fiber

using two 980 nm LDs as the pump source and making a fiber loop mirror with a 3 dB coupler

we develop a stabilized high-power wideband superfluorescence fiber source

which is configured in a two-stage double-pass forward pump structure.and has a power as high as 52.8 mW（17.15 dB）.Its 3 dB bandwidth can reach up to 40 nm without the use of any filter.This superfluorescent fiber source has been applied in the oil gas pipeline detecting project successfully.