Photonic-assisted single system for microwave frequency and phase noise measurement

被引：10
|
作者：
Shi, Jingzhan [1 ]
Zhang, Fangzheng [1 ]
Ben, De [1 ]
Pan, Shilong [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Key Lab Radar Imaging & Microwave Photon, Minist Educ, Nanjing 210016, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2020年 / 18卷 / 09期
基金：
中国国家自然科学基金;
关键词：
frequency measurement; phase noise measurement; microwave photonics; CROSS-CORRELATION; DELAY;
D O I：
10.3788/COL202018.092501
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a photonic-assisted single system for measuring the frequency and phase noise of microwave signals in a large spectral range. Both the frequency and phase noise to be measured are extracted from the phase difference between the signal under testing and its replica delayed by a span of fiber and a variable optical delay line (VODL). The system calibration, frequency measurement, and phase noise measurement are performed by adjusting the VODL at different working modes. Accurate frequency and phase noise measurement for microwave signals in a large frequency range from 5 to 50 GM is experimentally demonstrated.
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页数：5
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