论文标题
基于不一致的宽带光源的微波光子滤波器的信噪比比率
Signal-to-Noise Ratio of Microwave Photonic Filter With an Interferometric Structure Based on an Incoherent Broadband Optical Source
论文作者
论文摘要
从时间和频域分别提出了基于不一致的宽带光源（IBOS）的微波光子滤波器（MPF）的信噪比（SNR）的全面研究。 MPF中的干涉结构和IBO会导致有益的单带通射频（RF）响应。但是，IBO为过滤后的RF信号添加了相对较大的噪声。因此，对SNR的分析对于这种MPF的设计至关重要。理论分析表明，SNR是通带，调制指数，色散和IBOS形状的中心频率的函数。进行了一个实验以验证理论，实验结果与理论计算非常吻合。
A comprehensive investigation of the signal-to-noise ratio (SNR) of the microwave photonic filter (MPF) with an interferometric structure based on an incoherent broadband optical source (IBOS) is presented from the time and frequency domains, respectively. The interferometric structure and the IBOS in the MPF result in a beneficial single-bandpass radiofrequency (RF) response. However, the IBOS adds a relatively large noise to the filtered RF signal. Therefore, the analysis of the SNR is of great importance for the design of this kind of MPFs. Theoretical analysis shows that the SNR is a function of the center frequency of the passband, the modulation index, the chromatic dispersion, and the shape of the IBOS. An experiment is performed to verify the theory, and experimental results agree well with the theoretical calculation.
