Research on Orthogonal Polarized Dual-frequency Laser Beat Frequency Detection

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 10kHz and the measurement accuracy of 100kHz.The research result has good directive effect on the detection of the beat frequency.

关键词： Orthogonal polarized dual-frequency laser Beat frequency detection Frequency domain spectrum Demodulation

作者: Sun Guiling Jiao Guang Liu Bo Li Weixiang

作者单位: College of Information Technical Science, Nankai University, Tianjin, 300071, China

会议类型: 国际会议

会议名称: the 2010 International Conference on Frontiers of Manufacturing and Design Science(第一届制造与设计科学国际会议(ICFMD 2010))

会议地点: 重庆

会议语种:英文

页码: 1007-1011

在线出版日期: 2010-12-11（万方平台首次上网日期，不代表论文的发表时间）