Title :
A photonic approach to broadband microwave frequency measurement
Author :
Gu, Yiying ; Li, Shanfeng ; Han, Xiuyou ; Luo, Xin ; Hu, Jingjing ; Wu, Pengsheng ; Zhao, Mingshan
Author_Institution :
Photonics Res. Center, Dalian Univ. of Technol., Dalian, China
Abstract :
A novel photonic approach to microwave frequency measurement based on interference effect of microwave signals is proposed. In the simple measurement system, an unknown microwave signal is modulated simultaneously on two optical carriers with different wavelengths through a Mach-Zehnder modulator (MZM). The optical output from the MZM propagates in a dispersive medium, leading to different phase shifts. By scanning the wavelength of one optical carrier, the frequency of the microwave signal can be obtained directly through analyzing the interference intensity of the microwave signal from the photodetector. The validity of the proposed approach is demonstrated experimentally by obtaining the unknown microwave frequency from 1 to 15GHz.
Keywords :
frequency measurement; interference (signal); microwave detectors; microwave phase shifters; microwave photonics; optical communication equipment; optical fibre dispersion; optical modulation; photodetectors; Mach-Zehnder modulator; broadband microwave frequency measurement; dispersive medium; frequency 1 GHz to 15 GHz; interference effect; interference intensity; microwave signal frequency; microwave signal modulation; optical carrier wavelength; phase shift; photodetector; photonic approach; Frequency measurement; Microwave frequencies; Microwave photonics; Wavelength measurement;
Conference_Titel :
Microwave Photonics (MWP), 2010 IEEE Topical Meeting on
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4244-7824-8
DOI :
10.1109/MWP.2010.5664170
