MICROWAVE FILTERING REALIZED THROUGH INCOHERENT OPTICAL-PROCESSING

Analogue microwave filters can be produced using optical components wh en the microwave signal is modulated onto an optical carrier wave, pro cessed optically, and then recovered electrically. The fiber-optic net work presented here displays a bandpass filter response to the modulat ing signal. The processing operation is based on the transversal tappe d delay line technique forming an infinite impulse response structure. By employing an incoherent optical carrier wave for signal transmissi on the structure's responses are modelled using linear discrete signal -processing techniques.