Dispersion compensation method based on focus definition evaluation functions for high-resolution laser frequency scanning interference measurement

Liu, Guodong; Xu, Xinke; Liu, Bingguo; Chen, Fengdong; Hu, Tao; Lü, Cheng; Guo, Yu

doi:10.1016/j.optcom.2016.10.052

Cited by 21 publications

(2 citation statements)

References 15 publications

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“…The increase in measuring range necessitates that the length of the optical fiber must be increased accordingly, resulting in the effects of fiber jitter [20] and dispersion becoming more significant. Pan [21] and Liu [22], proposed different algorithms to eliminate the dispersion mismatch.…”

Section: Measurement Science and Technologymentioning

confidence: 99%

High-precision frequency sweeping interferometry for absolute distance measurement using a tunable laser with sweeping range of 88 GHz

Shi

Hei

Wang

et al. 2020

Meas. Sci. Technol.

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Distance measurement using frequency sweeping interferometry (FSI) is an absolute distance measurement technique that allows for high accuracy over long distances. Notwithstanding, the measurement accuracy is affected by laser sweeping nonlinearity and limited sweeping range. In this work, an optimized post-processing linearization method is demonstrated to realize high accuracy arbitrary distance measurement using a laser with small modulation range. The interference signal is sparsely resampled to eliminate the influence of the sweeping nonlinearity, and the absolute distance is obtained by analyzing the phase of the resampled signal. In the measurement system, a high finesse Fabry-Perot (F-P) cavity placed in vacuum is used as the measurement reference, so the effect of dispersion mismatch is negligible. Moreover, the distance measurement result is determined by the linear fit of the phase of each resampled point. Therefore, the influence of target vibration and other external random noise can be partially eliminated, and the reliability of the result is high. In the experiment, the sweeping range of the laser source is only 88 GHz. Comparing with a fringe counting interferometer, the standard deviation of the residual errors is 34 μm within a distance of 6.7 m.

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Section: Measurement Science and Technologymentioning

confidence: 99%

High-precision frequency sweeping interferometry for absolute distance measurement using a tunable laser with sweeping range of 88 GHz

Shi

Hei

Wang

et al. 2020

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…To expand the application scenarios of FSI, studies * Author to whom any correspondence should be addressed. on non-cooperative target measurement are increasingly being conducted [16][17][18]. For the FSI of non-cooperating targets, the quality of the return light and interferometric signal has always been a concern, because a non-cooperative target does not have the same reflection effect as the totally internally reflecting (TIR) mirror; therefore, the reflection and retraction of the measurement light and interference are greatly affected.…”

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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Analysis on coupling efficiency of the fiber probe used in frequency scanning interference distance measurement

Huang

Duan

et al. 2020

Optik

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Dispersion compensation method based on focus definition evaluation functions for high-resolution laser frequency scanning interference measurement

Cited by 21 publications

References 15 publications

High-precision frequency sweeping interferometry for absolute distance measurement using a tunable laser with sweeping range of 88 GHz

High-precision frequency sweeping interferometry for absolute distance measurement using a tunable laser with sweeping range of 88 GHz

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

Analysis on coupling efficiency of the fiber probe used in frequency scanning interference distance measurement

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