• Infrared and Laser Engineering
  • Vol. 47, Issue 2, 206002 (2018)
Xue Bin, Zhao Tuo, Wu Hanzhong, Zhang Kai, Wang Zhiyang, and You Hua
Author Affiliations
  • [in Chinese]
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    DOI: 10.3788/irla201847.0206002 Cite this Article
    Xue Bin, Zhao Tuo, Wu Hanzhong, Zhang Kai, Wang Zhiyang, You Hua. Speed measurement using femtosecond optical frequency comb based on phase signal processing[J]. Infrared and Laser Engineering, 2018, 47(2): 206002 Copy Citation Text show less

    Abstract

    Based on laser speed measurement, a method for high-accuracy speed measurement was developed by using femtosecond optical frequency comb based on the phase signal processing. The low speed measurement limit is μm/s level theoretically. The principle of phase changing was analyzed in detail, and a comprehensive model was established and simulated with MATLAB. The phase information of simulated measurement signals were processed by fast Fourier transform, and the speeds of μm/s, mm/s and m/s were measured respectively. Ideally, the measurement error was below 1 μm/s. In addition, arbitrary movement targets can be measured through the model. The movement state of target was restored with this method. The experiment was conducted to measure the speed of mm/s, and the relative errors were all within 4%. The results show that high-accuracy speed measurement can be achieved by using this method.
    Xue Bin, Zhao Tuo, Wu Hanzhong, Zhang Kai, Wang Zhiyang, You Hua. Speed measurement using femtosecond optical frequency comb based on phase signal processing[J]. Infrared and Laser Engineering, 2018, 47(2): 206002
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