揭示有障碍梁的模态内容
Revealing the modal content of obstructed beams
摘要：
在这项工作中，我们提出了一个预测器/指标的自愈能力的相干结构光束：字段的模态内容。具体地，被阻挡和未被阻挡的光束的模态谱之间的保真度用作光束在任意障碍物之后将可能自愈的程度的有用度量。由于任何光场都可以根据任何选择的正交基进行分解，因此这种分析比用于确定自愈能力的其他方法限制性更小。此外，由于模式内容是传播不变的，这使得光束自重构以这种方式在任何方便的横向平面进行研究。作为一个案例研究，我们提出了令人信服的实验证据的优越性的自愈性能的拉盖尔-高斯贝塞尔-高斯光束;分析，主要是促进所提出的措施。
英文摘要：
In this work, we propose a predictor/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 convenient 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.
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