Instantaneous Microwave Frequency Measurement Using an Optical Phase Modulator
Instantaneous Microwave Frequency Measurement Using an Optical Phase Modulator
复制标题
使用光相位调制器进行瞬时微波频率测量
DOI：
10.1109/lmwc.2009.2020046
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发表时间：
2009-06-01
影响因子：
3
通讯作者：
Yao, Jianping
中科院分区：
文献类型：
--
作者：
Zhang, Xiaomin;Chi, Hao;Yao, Jianping
提出了一种利用光相位调制器测量微波瞬时频率的新技术。在所提出的系统中，微波信号与其频率被测量调制在两个光波长的相位调制器，相位调制的光信号发送到色散元件，并在两个光电探测器检测。由于色散元件的色散，两个微波信号将经历不同的功率衰落，导致不同的功率对频率函数。建立微波频率和微波功率之间的固定关系。通过测量微波功率，估计微波频率。与使用强度调制器的技术相比，所提出的方法是简单的，更少的损失。由于不需要偏置，系统具有更好的稳定性，这是国防应用的高度期望。实验验证。
A novel technique for instantaneous microwave frequency measurement using an optical phase modulator is proposed and demonstrated. In the proposed system, a microwave signal with its frequency to be measured is modulated on two optical wavelengths at the phase modulator, with the phase-modulated optical signals sent to a dispersive element, and detected at two photo-detectors. Due to the chromatic dispersion of the dispersive element, the two microwave signals will experience different power fading, leading to different power versus frequency functions. A fixed relationship between the microwave frequency and the microwave powers is established. By measuring the microwave powers, the microwave frequency is estimated. Compared with the techniques using an intensity modulator, the proposed approach is simpler with less loss. Since no bias is needed the system has a better stability, which is highly expected for defense applications. Experimental verification is presented.