用标量平移加法定理计算椭圆高斯光光束形状系数

IF 1.9 3区物理与天体物理 Q2 OPTICS

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-08-23 DOI:10.1016/j.jqsrt.2025.109641

Haoyu Jiang, Yang Yang, Yiqian Tian, Yu Wang, Haitao Yu, Jianqi Shen

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引用次数: 0

摘要

基于标量势函数的球面波展开和标量平移加法定理，提出了一种计算圆形高斯光束电磁场波束形系数的两步间接方法。本文将间接方法推广到具有非轴对称截面的异形梁，即椭圆高斯梁。利用角谱分解方法，在光束坐标系下给出了标量势函数的BSCs。然后，基于STAT得到粒子坐标系下的标量BSCs，再将其转化为EGB的电磁BSCs。通过数值计算验证了间接法的精度和效率。

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Calculation of beam shape coefficients for elliptical Gaussian light using the scalar translational addition theorem

A two-step indirect method for calculating the beam shape coefficients (BSCs) of the electromagnetic field of the circular Gaussian beam was recently presented, based on the spherical wave expansion of the scalar potential function and the scalar translational addition theorem (STAT). In this paper, the indirect method is extended to the shaped beam with non-axisymmetric cross-section, more specifically the elliptical Gaussian beam (EGB). Using the angular spectrum decomposition method, the BSCs of the scalar potential function are formulated in the beam coordinate system. Then, based on the STAT, the scalar BSCs in the particle coordinate system are obtained, which can be further transformed to the electromagnetic BSCs of the EGB. Numerical calculations are carried out to verify the accuracy and efficiency of the indirect method.

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来源期刊

Journal of Quantitative Spectroscopy & Radiative Transfer 物理-光谱学

CiteScore

5.30

自引率

21.70%

发文量

273

审稿时长

58 days

期刊介绍： Papers with the following subject areas are suitable for publication in the Journal of Quantitative Spectroscopy and Radiative Transfer: - Theoretical and experimental aspects of the spectra of atoms, molecules, ions, and plasmas. - Spectral lineshape studies including models and computational algorithms. - Atmospheric spectroscopy. - Theoretical and experimental aspects of light scattering. - Application of light scattering in particle characterization and remote sensing. - Application of light scattering in biological sciences and medicine. - Radiative transfer in absorbing, emitting, and scattering media. - Radiative transfer in stochastic media.