Yermakov Oleh, Zeisberger Matthias, Schneidewind Henrik, Lorenz Adrian, Wieduwilt Torsten, Schwuchow Anka, Khosravi Mohammadhossein, Tiess Tobias, Schmidt Markus A
Department of Fiber Photonics, Leibniz Institute of Photonic Technology, Jena, Germany.
Department of Computational Physics, V. N. Karazin Kharkiv National University, Kharkiv, Ukraine.
Nat Commun. 2025 Mar 7;16(1):2294. doi: 10.1038/s41467-025-57440-2.
Precise analysis of light beams is critical for modern applications, especially in integrated photonics, with traditional methods often struggling with efficient angular demultiplexing in compact environments. Here, we present a novel fiber-based approach that achieves angular demultiplexing through angle-sensitive coupling in nanostructure-enhanced multicore fibers. Our device uses axially symmetric nanoprinted structures to distribute the angular power spectrum of incident light over different fiber cores through higher diffraction orders. By implementing algorithmically optimized nanostructures on a seven-core single-mode fiber facet via 3D nanoprinting, we demonstrate unprecedented in-coupling efficiency over wide incident angle ranges. Our theoretical and experimental results confirm the ability of the device to function as both an angular demultiplexer and a highly efficient remote light collector. The presented approach to remotely collect and analyze light, and the combination of multicore fibers and fiber-based nanostructures, opens new possibilities for high-capacity telecommunications, environmental monitoring, bioanalytical sensing, and integrated photonic applications.
对光束进行精确分析对于现代应用至关重要，尤其是在集成光子学领域，传统方法在紧凑环境中进行高效角度解复用时常面临困难。在此，我们提出一种基于光纤的新颖方法，该方法通过纳米结构增强的多芯光纤中的角度敏感耦合来实现角度解复用。我们的器件使用轴对称纳米印刷结构，通过更高的衍射级次将入射光的角度功率谱分布在不同的光纤芯上。通过经由3D纳米印刷在七芯单模光纤端面上实现算法优化的纳米结构,我们展示了在宽入射角范围内前所未有的耦合效率。我们的理论和实验结果证实了该器件兼具角度解复用器和高效远程光收集器的功能。所提出的远程收集和分析光的方法以及多芯光纤与基于光纤的纳米结构的结合，为高容量电信、环境监测、生物分析传感和集成光子应用开辟了新的可能性。
