Abstract
A single passband tunable microwave photonic notch filter with ultrawide tunable range is presented. It is based on dual-drive Mach-Zehnder modulator and stimulated Brillouin scattering. By introducing two pump signals whose frequency interval equals twice of the Brillouin frequency shift, the available filter tuning range can reach 4fB. With the increase of the number of pump light the tuning range of the filter will grow proportionally. The amplitude of the output signal of the notch filter changes with the half-wave voltage and a DC bias voltage of DDMZM.
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