1.Erbium-doped superfluorescent fiber sources (SFS) pumped near 980nm in double-pass backward (DPB) configuration have been characterized through theoretical simulation.

1.理论研究了双程后向结构掺超荧的特性。

2.Erbium ions concentration is obtained by the information of measured coefficients along with modeling of double-pass backward (DPB) superfluorescent fiber source (SFS).

2.再些系数和复行后向超萤的模拟，得到掺的浓度。