Signal model analysis of asymmetric spatial heterodyne spectral velocimetry

Xiang Peng; En-hai Liu; Shu-lin Tian; Ru-jin Zhao

doi:10.1117/12.2686870

6 August 2023 Signal model analysis of asymmetric spatial heterodyne spectral velocimetry

Xiang Peng, En-hai Liu, Shu-lin Tian, Ru-jin Zhao

Proceedings Volume 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023); 127812F (2023) https://doi.org/10.1117/12.2686870
Event: 2023 International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 2023, Guangzhou, JS, China

Abstract

The asymmetric spatial heterodyne spectral velocimetry technology is a new high-precision velocimetry method proposed in recent decades, and relevant research institutions have also obtained excellent measurement results at the application level based on this technique. However, past researchers mainly focused on the optimization of its optical characteristics and structure, and without in-depth research on its signal model. This paper analyzed the technique from the principal level, established the relevant mathematical model, and explained the origin of its high resolution. Based on the measurement mechanism described in this paper, on the one hand, it reflects the advantages of asymmetric spatial heterodyne spectral velocimetry technology; on the other hand, it also defines its application scope and defects. Through the research in this paper, the asymmetric spatial heterodyne spectral velocimetry technology can have both ultra-high measurement accuracy and low computational complexity. Furthermore, it also provided a reference for its application range.

Citation Download Citation

Xiang Peng, En-hai Liu, Shu-lin Tian, and Ru-jin Zhao "Signal model analysis of asymmetric spatial heterodyne spectral velocimetry", Proc. SPIE 12781, International Conference on Optoelectronic Information and Functional Materials (OIFM 2023), 127812F (6 August 2023); https://doi.org/10.1117/12.2686870

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KEYWORDS

Velocimetry

Spectroscopy

Signal processing

Spectral resolution

Doppler effect

Heterodyning

Optical path differences

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