We propose a general guideline on the design of stimulated Brillouin scattering (SBS) based microwave photonic filter (MPF) using directly-modulated pump. Filter gain profiles and passband ripples with the waveform repetition periods of the driving current ranging from 2 ns to 100 ns are measured after transmission of different fiber length. The results show that the filter performance has nothing to do with the fiber length and the DAC bandwidth requirement for the driving current is no more than 500MHz. Therefore the low cost, flexible reconfiguration and miniaturization characteristics make SBS filter using directed-modulated pump a promising choice as MPF.
Hu Kai, Yi Lilin, Wei Wei, Hu Weisheng. Microwave Photonic Filter Design and Optimization Based on Stimulated Brillouin Scattering Using Directly-Modulated Pump[J]. Chinese Optics Letters, 2019, 17(6): .
