Research on Orthogonal Polarized Dual-frequency Laser Beat Frequency Detection

被引：0
|
作者：
Sun Guiling [1 ]
Jiao Guang [1 ]
Liu Bo [1 ]
Li Weixiang [1 ]
机构：
[1] Nankai Univ, Coll Informat Tech Sci, Tianjin 300071, Peoples R China
来源：
FRONTIERS OF MANUFACTURING AND DESIGN SCIENCE, PTS 1-4 | 2011年 / 44-47卷
关键词：
Orthogonal polarized dual-frequency laser; Beat frequency detection; Frequency domain spectrum; Demodulation;
D O I：
10.4028/www.scientific.net/AMM.44-47.1007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, sweep heterodyne method and fast Fourier transform (FFT) are combined to realize the beat frequency detection. The input signal is mixed with the signal generated by the local oscillator (LO), and then is filtered through the middle placed filter. The sweeping signal generated by the DDS is mixed again with the reduced input frequency. After a resolution filter, the signal is processed by FPGA. Beat frequency signal in the range of 800MHz to 1200MHz can be detected with the detection resolution of 10k Hz and the measurement accuracy of 100kHz. The research result has good directive effect on the detection of the beat frequency.
引用
收藏
页码：1007 / 1011
页数：5
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