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FSI-based non-cooperative target absolute distance measurement method using PLL correction for the influence of a nonlinear clock.

Journal Article


Abstract


  • We propose a frequency swept interferometry (FSI)-based absolute distance measurement method that can be used to measure a noncooperative target located at a distance of 10s of m. In this method, an external cavity laser serves as the frequency tuning laser, and a single frequency laser and two acoustic optical modulators (AOMs) are used to measure the optical path difference (OPD) variation during the frequency tuning, which can correct the Doppler effect. A phase-locked loop (PLL) is introduced to synchronize the nonlinearities between the OPD variation measurement signal and the absolute distance measurement signal, improving the signal-to-noise ratio (SNR) of the OPD variation measurement signal. The distance to a noncooperative target located at 15 m is experimentally measured using this method, and a precision of 3.43 μm is obtained.

Publication Date


  • 2018

Citation


  • Lu, C., Xiang, Y., Gan, Y., Liu, B., Chen, F., Liu, X., & Liu, G. (2018). FSI-based non-cooperative target absolute distance measurement method using PLL correction for the influence of a nonlinear clock.. Optics letters, 43(9), 2098-2101. doi:10.1364/ol.43.002098

Web Of Science Accession Number


Start Page


  • 2098

End Page


  • 2101

Volume


  • 43

Issue


  • 9

Abstract


  • We propose a frequency swept interferometry (FSI)-based absolute distance measurement method that can be used to measure a noncooperative target located at a distance of 10s of m. In this method, an external cavity laser serves as the frequency tuning laser, and a single frequency laser and two acoustic optical modulators (AOMs) are used to measure the optical path difference (OPD) variation during the frequency tuning, which can correct the Doppler effect. A phase-locked loop (PLL) is introduced to synchronize the nonlinearities between the OPD variation measurement signal and the absolute distance measurement signal, improving the signal-to-noise ratio (SNR) of the OPD variation measurement signal. The distance to a noncooperative target located at 15 m is experimentally measured using this method, and a precision of 3.43 μm is obtained.

Publication Date


  • 2018

Citation


  • Lu, C., Xiang, Y., Gan, Y., Liu, B., Chen, F., Liu, X., & Liu, G. (2018). FSI-based non-cooperative target absolute distance measurement method using PLL correction for the influence of a nonlinear clock.. Optics letters, 43(9), 2098-2101. doi:10.1364/ol.43.002098

Web Of Science Accession Number


Start Page


  • 2098

End Page


  • 2101

Volume


  • 43

Issue


  • 9