Complete modal characterization in Laguerre-Gaussian Beams using a paraboloid off-axis reflector

IF 2 3区物理与天体物理 Q3 OPTICS

Applied Physics B Pub Date : 2025-07-11 DOI:10.1007/s00340-025-08510-2

Ali Mardan Dezfouli, Mario Rakić, Hrvoje Skenderović

引用次数: 0

Abstract

Characterizing both the radial (p) and azimuthal (ℓ) indices of Laguerre-Gaussian (LG) beams remains a challenge mainly due to their transverse amplitude profiles. We report a simple yet robust method for simultaneously identifying both mode indices using an off-axis parabolic mirror (OPM). The far-field diffraction pattern produced by an incident LG beam on OPM exhibits characteristic spot distributions, which can be analyzed to determine the magnitude and sign of the topological charge, as well as the radial index. Furthermore, we show that this technique exhibits excellent tolerance to beam misalignment. Experimental results show good agreement with numerical simulations.

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利用抛物面离轴反射器完成拉盖尔-高斯光束的模态表征

表征拉盖尔-高斯光束的径向(p)和方位角(r)指数仍然是一个挑战，主要是因为它们的横向振幅分布。我们报告了一个简单而稳健的方法，同时识别两种模式指数使用离轴抛物面镜（OPM）。入射LG光束在OPM上产生的远场衍射图显示出特征的光斑分布，可以通过分析光斑分布来确定拓扑电荷的大小和符号，以及径向指数。此外，我们表明该技术对光束错位具有良好的容忍度。实验结果与数值模拟结果吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.