A Technical Study of Performance of a Cascaded Incoherent Spectrum Sliced Transversal Photonic Microwave Filter

摘要

An analysis of the performance of a simple, incoherent spectrum sliced microwave photonic filter is demonstrated. This filter structure is based on cascading of two incoherent fiber Fabry -Perot filters as a slicing element of a broadband optical source. The filter performance is studied by measuring the overall Free Spectral Range, 3dB Bandwidth, Quality factor and Main Lobe to Sidelobe Suppression level for different modes of connecting the filter in cascaded configuration. The filter performance measures are also studied by employing hamming window. Also simulation results are presented. The Characteristics of cascaded FP filters with different configurations are tabulated. The results were compared for cascaded configuration with and without hamming window. The estimated performances show that this cascaded filter combination can be tuned over the frequency from 4.6 GHz to 18 GHz with very good sidelobe suppression level.