Liu Yuxin, Guo Yifeng, Wu Shibao
Appl Opt. 2022 May 1;61(13):3663-3670. doi: 10.1364/AO.456507.
We propose a new, to the best of our knowledge, scheme for the frequency measurement of wideband microwave signals by applying the optical frequency comb (OFC) and channelization technique. Unlike the usual method of using radio-frequency driving signals to generate an OFC, our scheme uses digital driving signals, which makes the comb spacing adjustable and the comb bandwidth wider. In the measurement process, multiple sets of beat signals can be obtained at the same time, and multiple frequency components of the microwave signals can be measured at the same time. The theoretical analysis model of the scheme is established, and the scheme is validated by VPI simulation software. The results show that the range of frequency measurement is 0∼50, and it can be further expanded by extending the width of the OFC.
据我们所知，我们提出了一种新的利用光学频率梳（OFC）和信道化技术对宽带微波信号进行频率测量的方案。与通常使用射频驱动信号来产生光学频率梳的方法不同，我们的方案使用数字驱动信号，这使得梳状谱线间距可调且梳状带宽更宽。在测量过程中，可以同时获得多组拍频信号，并且可以同时测量微波信号的多个频率分量。建立了该方案的理论分析模型，并通过VPI仿真软件对该方案进行了验证。结果表明，频率测量范围为0∼50，并且可以通过扩展光学频率梳的宽度进一步扩大。
