Nguyen Tuan A, Chan Erwin H W, Minasian Robert A
Opt Lett. 2014 Apr 15;39(8):2419-22. doi: 10.1364/OL.39.002419.
A new microwave photonic instantaneous frequency measurement system that can simultaneously measure multiple-frequency signals while achieving very high resolution and wide frequency measurement range is presented. It is based on the frequency-to-time mapping technique implemented using a frequency shifting recirculating delay line loop and a narrowband optical filter realized by the in-fiber stimulated Brillouin scattering effect. Experimental results demonstrate the realization of a multiple-frequency measurement capability over a frequency range of 0.1-20 GHz that can be extended to 90 GHz, and with a measurement resolution of 250 MHz.
本文提出了一种新型微波光子瞬时频率测量系统，该系统能够在实现高分辨率和宽频率测量范围的同时，对多个频率信号进行同步测量。它基于频率-时间映射技术，该技术通过移频循环延迟线环以及利用光纤中的受激布里渊散射效应实现的窄带光学滤波器来实现。实验结果表明，该系统在0.1-20GHz频率范围内实现了多频率测量能力，测量范围可扩展至90GHz，测量分辨率为250MHz。
