基于光子方法的可重构微波信号瞬时频率测量  

Reconfigurable photonic microwave instantaneous frequency measurement

作　　者：兰萍[1] 严李强[1] 王龙业[1] 

机构地区：[1]西藏大学工学院,拉萨850000

出　　处：《光通信技术》2015年第11期40-42,共3页Optical Communication Technology

基　　金：国家自然科学基金(61261021;61461047;61561046)资助

摘　　要：提出了一种基于光子方法的可重构微波信号瞬时频率测量方案。待测微波信号首先经载波抑制的双边带调制,产生的+1或者-1阶边带进入两个梳状滤波器中进行处理。通过对比两个滤波器输出的功率值即可在一个单调区间内估计出唯一的微波频率值。结果证明,在37GHz的微波频率测量范围内,测量误差小于±80MHz。A reconfigurable photonic approach to microwave instantaneous frequency measurement is pro- posed based on two optical comb filters. An optical carrier is modulated by a microwave signal to be measured in terms of cartier-suppression and single sideband （CS-SSB） modulation, resulting in a single induced optical sideband （＋1 or -1） which goes through two optical comb filters. By comparing the two filtered optical powers, the power ratio can be achieved to estimate the unique microwave frequency in a monotonic interval. The unique feature is that the microwave frequency measurement range and accuracy are tunable only if the initial phase of one filter is changed. Results show that the measurement error less than 80MHz are achieved within the range of 37GHz.

关 键 词：瞬时频率测量 微波光子学 光梳状滤波器 自由频谱宽度 

分 类 号：TN929.11[电子电信—通信与信息系统]