A frequency-tuning-range-extended and passband-selected microwave photonic filter (MPF) based on dual-polarization dual-parallel Mach-Zehnder modulator (DPol-DPMZM) is proposed and experimentally demonstrated. The upper DPMZM is biased to serve as an equivalent phase modulator, while the lower DPMZM is selectively biased to generate different modulated sideband for pump wave, and then different passband frequency response is selectively realized based on the stimulated Brillouin scattering effect. By using the upper and lower sidebands of carrier-suppression single sideband for pump wave successively, the frequency tuning range of the single-passband MPF can be extended by a value of Brillouin frequency shift, comparing with only one sideband is used. A single-passband MPF with a frequency tuning range of 1.43–19.43 GHz is experimentally obtained, while only a single-tone RF with a frequency range of DC-9 GHz is used. The double-passband MPF with equal passband magnitude and frequency interval tuned is also experimentally achieved.

提出并实验证明了一种基于双极化双并联马赫-曾德调制器 (DPol-DPMZM) 的频率调谐范围扩展和通带选择微波光子滤波器 (MPF)。上DPMZM被偏置作为等效相位调制器，而下DPMZM被选择性偏置以产生不同的泵浦调制边带，然后基于受激布里渊散射效应选择性地实现不同的通带频率响应。通过将载波抑制单边带的上下边带依次用于泵浦，与仅使用一个边带相比，单通带MPF的频率调谐范围可以扩展一个布里渊频移值。通过实验获得了频率调谐范围为 1.43-19.43 GHz 的单通带 MPF，而仅使用频率范围为 DC-9 GHz 的单音射频。还通过实验实现了具有相同通带幅度和频率间隔调谐的双通带 MPF。