Single-Notch Microwave Photonic Filter Using a Nonsliced ASE Source and a Laser Diode

We present a continuously tunable single-notch microwave photonic filter (MPF) using polarization processing of a nonsliced amplified spontaneous emission (ASE) source and a laser diode (LD). The ASE source is used to generate a single-passband MPF, whereas the LD is used to realize a broadband microwave photonic phase shifter (MPS). By destructive interfering between the single-passband MPF and the MPS, a widely tunable single-notch MPF is achieved. The proposed method has been theoretically analyzed and experimentally verified.