Characterization and Exploitation of the Rotational Memory Effect in Multimode Fibers

IF 11.6 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Rodrigo Gutiérrez-Cuevas, Arthur Goetschy, Yaron Bromberg, Guy Pelc, Esben Ravn Andresen, Laurent Bigot, Yves Quiquempois, Maroun Bsaibes, Pierre Sillard, Marianne Bigot, Ori Katz, Julien de Rosny, Sébastien M. Popoff
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Abstract

In an ideal perfectly straight multimode fiber with a circular core, the symmetry ensures that rotating the input wave front leads to a corresponding rotation of the output wave front. This invariant property, known as the rotational memory effect (RME), remains independent of the typically unknown output profile. The RME thus offers significant potential for imaging and telecommunication applications. However, in real-life fibers, this effect is degraded by intrinsic imperfections and external perturbations, and is challenging to observe because of its acute sensitivity to misalignments and aberrations in the optical setup. Building on a previously established method for precisely estimating fiber transmission properties, we demonstrate an accurate extraction of RME properties. Additionally, we introduce a comprehensive theoretical framework for both qualitative and quantitative analysis, which specifically links the angular-dependent correlation of the RME to the core deformation’s geometrical properties and the fiber’s mode characteristics. Our theoretical predictions align well with experimental data and simulations for various amounts of fiber distorsion. Finally, we demonstrate the ability to engineer wave fronts with significantly enhanced correlation across all rotation angles. This work enables accurate characterization of distributed disorder from the fabrication process and facilitates calibration-free imaging in multimode fibers.

Abstract Image

多模光纤旋转记忆效应的表征与利用
在理想的具有圆形纤芯的完全笔直多模光纤中,对称性确保了输入波前的旋转会导致输出波前的相应旋转。这一不变特性被称为旋转记忆效应(RME),与通常未知的输出轮廓无关。因此,RME 为成像和电信应用提供了巨大的潜力。然而,在现实生活中的光纤中,这种效应会受到内在缺陷和外部扰动的影响,而且由于其对光学装置中的错位和像差非常敏感,因此观察起来非常困难。基于之前建立的精确估算光纤传输特性的方法,我们展示了精确提取 RME 特性的方法。此外,我们还为定性和定量分析引入了一个全面的理论框架,该框架将 RME 随角度变化的相关性与纤芯变形的几何特性和光纤的模式特性具体联系起来。我们的理论预测与各种光纤扭曲量的实验数据和模拟结果非常吻合。最后,我们展示了在所有旋转角度下设计相关性显著增强的波前的能力。这项工作能够准确表征制造过程中的分布式失调,并促进多模光纤的免校准成像。
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来源期刊
Physical Review X
Physical Review X PHYSICS, MULTIDISCIPLINARY-
CiteScore
24.60
自引率
1.60%
发文量
197
审稿时长
3 months
期刊介绍: Physical Review X (PRX) stands as an exclusively online, fully open-access journal, emphasizing innovation, quality, and enduring impact in the scientific content it disseminates. Devoted to showcasing a curated selection of papers from pure, applied, and interdisciplinary physics, PRX aims to feature work with the potential to shape current and future research while leaving a lasting and profound impact in their respective fields. Encompassing the entire spectrum of physics subject areas, PRX places a special focus on groundbreaking interdisciplinary research with broad-reaching influence.
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