基于受激布里渊散射(SBS)和可调谐多波长光纤激光器, 设计了一款基于新型多抽头的复系数微波光子滤波器。该滤波器由SBS效应引入一个相移量实现复系数, 通过调节SBS的泵浦光功率控制相移量的大小, 进而实现滤波器的中心频率连续可调谐。实验研究了基于高掺杂铒纤的可调谐多波长光纤激光器, 得到了波长间隔为0.338 nm的多达16个激光信号的稳定输出。以实验数据为抽头光源, 仿真研究了SBS增益介质长度、抽头光源的数目和波长间隔对该款微波光子滤波器性能的影响。

A kind of multitap complex coefficient microwave photonic filter was proposed based on novel tunable multi-wavelength fiber laser and stimulated Brillouin scattering(SBS). The complex coefficient was realized based on a phase shift introduced by SBS. The phase shift was controlled by adjusting the pump power of SBS, and so the center frequency of the filter was adjusted continuously. 16 laser signals with wavelength intervals of 0.338 nm were obtained based on a tunable multi-wavelength high erbium doped fiber laser in experiment. And then, the influence on this filter by the length of SBS gain medium, the number of the taps and the wavelength interval were researched by simulation.