Statistical properties of scattering fields and intensity fluctuation correlation function from rarefied randomly distributed particles

Yiming Zhou; Yue Peng; Mingjun Wang

doi:10.1117/12.3045674

13 December 2024 Statistical properties of scattering fields and intensity fluctuation correlation function from rarefied randomly distributed particles

Yiming Zhou, Yue Peng, Mingjun Wang

Author Affiliations +

Proceedings Volume 13492, AOPC 2024: Laser Technology and Applications; 1349202 (2024) https://doi.org/10.1117/12.3045674
Event: Applied Optics and Photonics China 2024 (AOPC2024), 2024, Beijing, China

Abstract

Discrete particles randomly distributed in the ground-space link significantly impact laser signal transmission. Studying their scattering fields is crucial for laser speckle imaging and weak signal detection. This paper uses Mie theory to derive the statistical characteristics of scattering fields from laser-particle interactions, providing expressions for second and fourth-order statistical properties and the intensity fluctuation correlation function. Numerical calculations were performed on the mean function, correlation function, and intensity fluctuation cross-correlation function for a Gaussian-distributed rarefied particle group, considering particle radius changes. Results show that particle scattering fields have inherent correlation, which increases with particle size and shows periodicity. This correlation is largely independent of the particle's distance from the observation point, while particles at different locations exhibit high correlation for larger sizes. When the particle radius is near 0.2 mm, the speckle intensity cross-correlation function approaches 1. This research enhances our understanding of laser speckle imaging and weak laser scattering signals, aiding the development of more efficient optical communication systems and laying a foundation for future studies on laser speckle characteristics.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Yiming Zhou, Yue Peng, and Mingjun Wang "Statistical properties of scattering fields and intensity fluctuation correlation function from rarefied randomly distributed particles", Proc. SPIE 13492, AOPC 2024: Laser Technology and Applications, 1349202 (13 December 2024); https://doi.org/10.1117/12.3045674

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KEYWORDS

Atmospheric particles

Laser scattering

Particles

Speckle

Correlation function

Light scattering

Scattering

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