In this paper, we propose a predictor or indicator of the self-healing ability of coherent structured light beams: the field's modal content. Specifically, the fidelity between the obstructed and unobstructed beams' modal spectrum serves as a useful measure of the degree to which the beam will likely self-heal after an arbitrary obstacle. Since any optical field can be decomposed in terms of any chosen orthonormal basis, this analysis is, therefore, less restrictive than other methods for determining self-healing ability. Furthermore, since modal content is propagation invariant, this allows beam self-reconstruction to be studied in this way at any available transverse plane. As a case study, we present convincing experimental evidence for the superiority of the self-healing properties of Laguerre-Gaussian over Bessel-Gaussian beams, analysis that is facilitated primarily by the proposed measure.

中文翻译：

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揭示受阻光束的模态含量

在本文中，我们提出了相干结构光束的自愈能力的预测器或指示符：场的模态含量。具体而言，受阻光束和未受阻光束的模态光谱之间的保真度是光束在任意障碍物发生后可能自我修复的程度的有用度量。由于任何光场都可以根据任何选定的正交标准分解，因此，此分析比其他确定自愈能力的方法的限制较少。此外，由于模态含量是传播不变的，因此可以在任何可用的横向平面上以这种方式研究光束的自重构。作为案例研究，我们提供了令人信服的实验证据，证明Laguerre-Gaussian的自愈特性优于Bessel-Gaussian光束，