Phase-generated carrier combined with the Hilbert transform for phase demodulation in frequency-scanning interferometry

Zhu, Yu; Wang, Zhi-Yong; Tian, Kai; Jing, Tao; Guo, Xiaopeng; Liu, Zhigang

doi:10.1016/j.optlaseng.2022.106988

Cited by 12 publications

(1 citation statement)

References 35 publications

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“…As a high-precision and low-cost absolute distance optical measurement method, frequency scanning interferometry (FSI) is widely used in absolute distance measurement [1][2][3][4][5][6][7][8], geometric accuracy monitoring of large machining centres [9], optical fibre non-destructive testing [10,11], optical coherence tomography [12,13], and light detection and ranging for autonomous driving, as well as other fields [14,15]. In FSI measurement, to obtain high-precision measurement results, a cooperative target mirror is typically used as the point to be measured.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of frequency scanning interferometry signal for non-cooperative target based on generative adversarial network

Tian¹,

Liu²,

Zhang³

et al. 2022

Meas. Sci. Technol.

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In non-cooperative target frequency scanning interferometry, the return optical power is low, the quality of the interferometric signal is poor, and the signal-to-noise ratio (SNR) is low. Moreover, the power change accompanying the use of the frequency scanning laser modulates the interferometric signal’s amplitude and shifts the amplitude centre. Traditional signal enhancement techniques, such as filtering, can only solve some of the problems affecting the measurement accuracy, and the full-factor processing of such signals is difficult. This paper proposes a non-cooperative target FSI signal enhancement method based on a generative adversarial network. By learning the sample dataset, the SNR of the signal can be improved within a certain range, and the signal waveform can be corrected simultaneously. The simulation results reveal that the SNR of the non-cooperative target signal is improved and the signal waveform is satisfactorily corrected. Finally, the effectiveness of the enhancement method was experimentally confirmed.

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