Switchable Microwave Photonic Filter between Dual-notch and Dual-passband Responses

We present a microwave photonic filter (MPF) which is switchable between dual-notch and dual-passband responses. In the MPF, a dual-drive Mach-Zehnder modulator is used to generate a quasi-single-sideband or phase-modulated signal by controlling the bias of the modulator. The first-order sidebands of the modulated signal are processed by stimulated Brillouin scattering in optical fiber to build or...