Investigation of dispersion influence on the chirp microwave generation using microwave photonic link without optical filter

In this work, we investigate the influence of the second-order (2OD) and third-order (3OD) dispersion terms on chirp signal generation and transmission through RF photonic link without any optical filter. Dispersion equations are formalised using Taylor series and Bessel function to study the link performance. Our result (eye diagrams) shows that 2OD+3OD has a significant impact on chirp mm-wave propagation through fibres of different lengths. In this paper, chirp mm signal is controlled at photo detector by individual phase term of external modulators. Moreover, we experimentally demonstrate that the chirp rate can be significantly controlled by properly choosing the type of fibre in the experiments. We discuss the RF photonic link performance in terms of optical sideband suppression ratio (OPSSR), Radio Frequency Spurious Suppression Ratio (RFSSR), and Bit Error Rate (BER). Theoretical results are verified using MATLAB Software.