【摘要】 基于相位调制技术和受激布里渊散射(SBS)效应,研制了可调谐单通带微波光子滤波器(MPF)。理论分析表明,通过引入频率间隔为受激布里渊频移量2倍的两个泵浦信号,使低频泵浦信号产生的损耗谱和高频泵浦信号产生的增益谱相抵消,所实现的滤波器的频率调谐范围为受激布里渊频移量的4倍,是单个泵浦信号时频率调谐范围的2倍,且随着泵浦光的数量增加滤波器的调谐范围呈倍数增长。实验测试了单泵浦条件下单通带可调谐滤波器的频率范围为0.8~18.2GHz,线宽为26MHz,带外抑制比为26dB,双泵浦时滤波器的频率调谐范围为0.8~31.1GHz。更多还原

【Abstract】 A tunable single-passband microwave photonic filter is developed based on phase modulation and stimulated Brillouin scattering.Theoretically,by introducing two pump signals whose frequency interval equals 2times as large as the stimulated Brillouin frequency shift,the loss spectrum generated by the pump signal with low frequency is offset by the gain spectrum of the pump signal with high frequency.As a result,a tuning range of 44 GHz is achieved which is 2times as large as the range of a single pump signal.With the increase of the number of pump light,the tuning range of the filter will grow exponentially.Under a single pump and two pumps,we test the filter.The results are presented,which demonstrate a 0.8-18.2GHz and 0.8-31.1GHz measured tuning ranges,respectively,together with a bandwidth of 26 MHz and a out-of-band rejection of 26 dB.更多还原