An approach to select a band-pass window on the frequency response of a microwave photonic filter

This work describes a microwave photonic filter (MPF) that exhibits five band-pass windows at multiples of 2.0GHz into the frequency range of 0.1-12GHz. A novel electrical microwave band-pass filter (BPF) is designed and fabricated to operate at 4.0GHz. The fabricated BPF exhibits a compact size, low losses, high selectivity and high spurious frequency; these characteristics permit its inclusion into the MPF structure allowing a substantial improvement of the frequency response of the MPF. Experimentally it is demonstrated that the band-pass window selected by the use of the BPF is used as an electrical carrier to transmit an analogue TV-signal over an optical link of 28.25Km.