Nie Kuiying1, Hu Zonghua1, Yu Kun1, et al. Study on microwave photonic filters based on a pair of FBG assisted by a ring resonator[J]. 2013,(4):43-45. DOI: 10.13756/j.gtxyj.2013.04.005.
A Microwave Photonic Filter(MPF)with a pair of Fiber Bragg Grating(FBG)assisted by a ring resonator is proposed on the basis of the in-depth study of the MPF theory.An MPF with the maximum flat filtering response is obtained by optimizing its structural parameters and the system transfer function of such a MPF is acquired on the basis of the detailed analysis by using a signal flow graph.The effects of the coupling coefficient
the reflectivity of the pair of FBG
the length and the gain of the fiber ring on the system transmission characteristics are analyzed by using the MATLAB software.The results show that this filter with such a structure is effective and feasible and has potential applications in microwave and millimeter-wave fiber-optic systems.