采用改进的反射式Mach-Zehnder干涉滤波器,对双程后向结构掺铒光纤超荧光光源(DPB SFS) 分别进行光谱分割和光谱预分割,构建了两种结构的多波长超荧光光纤光源(MW SFS),波长间隔为～0.8 nm时,在1550 nm附近(1542～1559 nm)20个波长的功率波动小于0.5 dB.其中前者消光比高达27 dB;后者消光比～18 dB,在泵浦光功率为72.8 mW时,最大输出功率25.3 mW,光光转换效率高达34.8%.改变Mach-Zehnder干涉仪的臂长??采用光谱预分割技术,得到1550 nm附近波长间隔～0.4 nm、消光比～16 dB的50个波长输出.

Based on an erbium-doped double pass backward (DPB) superfluorescent fiber source (SFS), by employing a improved Mach-zehnder interferometer filter (MZI) as spectrum slicing and spectrum pre-slicing component, respectively, two multi-wavelength superfluorescent fiber sources (MW SFSs) with channel spacing of ～0.8 nm are got. For the 20 channels around 1550 nm (from 1542 to 1559 nm), the power fluctuations are less than 0.5 dB. The extinction of the former is as high as 27 dB, and the latter is ～18dB. With the latter schematic, output power as high as 25.3 mW with pump efficiency of 34.8% is achieved under a limited 980 nm pump power of 72.8 mW. By changing the difference of the arms of the Mach-Zehnder interferometer filter, 50 channels around 1550 nm with spacing of ～0.4 nm are got, and the extinction is ～16 dB.