Zhang Ke, Zhong Yibo, Ke Changjian, Liu Deming
Opt Lett. 2017 Sep 1;42(17):3287-3290. doi: 10.1364/OL.42.003287.
A high-input dynamic range and selectivity stimulated Brillouin scattering (SBS)-based microwave photonic filter (MPF) is proposed and experimentally demonstrated. By utilizing a pump-splitting dual-stage scheme to mitigate the gain saturation, an input dynamic range of >40 dB and a selectivity of >49 dB are achieved simultaneously for the first time, to the best of our knowledge. The bandwidth is reconfigurable from 50 MHz to 200 MHz by tailoring the Brillouin pump precisely. During the bandwidth turning, the passband ripple is maintained <1.3 dB, and the 20-dB shape factor is 1.2 for the 200-MHz case. The superior performance makes the proposed SBS-MPF one of the best candidates for microwave photonics applications.
提出并通过实验验证了一种基于高输入动态范围和选择性受激布里渊散射（SBS）的微波光子滤波器（MPF）。通过采用泵浦分裂双级方案来减轻增益饱和，据我们所知，首次同时实现了大于40 dB的输入动态范围和大于49 dB的选择性。通过精确调整布里渊泵浦，带宽可在50 MHz至200 MHz之间重新配置。在带宽转换期间，通带纹波保持小于1.3 dB，对于200 MHz的情况，20 dB形状因子为1.2。优异的性能使所提出的SBS-MPF成为微波光子学应用的最佳候选方案之一。
