德国莱布尼茨光子技术研究所Schmidt, Markus A.团队研究了可调元光纤：使用双芯光纤上的3D纳米打印全息图进行远程空间聚焦控制。相关论文于2025年7月7日发表在《光：科学与应用》杂志上。

在远程位置产生可调谐聚焦的光是广泛应用的关键光子功能。

研究组在新兴超光纤领域提出了一个新概念，首次实现了快速、无对准、单片光纤集成的空间焦点控制。这是由3D纳米打印的光敏相位光纤全息图实现的，它在全息图平面上的光强分布和聚焦位置之间建立了直接的相关性。精确调整双芯光纤模式之间的相对功率，可以在全息图中产生功率控制的干涉图案，从而实现可控的和动态的焦点转移。

该研究工作涉及所有相关方面，包括计算优化、先进的3D纳米打印和定制纤维制造。仿真支持的实验结果验证了该单片光纤平台的可行性和有效性，该平台能够实现快速调焦，在光学操作、高速激光微加工、电信和微创手术方面具有变革潜力。

附：英文原文

Title: Tunable metafibers: remote spatial focus control using 3D nanoprinted holograms on dual-core fibers

Author: Sun, Jun, Huang, Wenqin, Lorenz, Adrian, Zeisberger, Matthias, Schmidt, Markus A.

Issue&Volume: 2025-07-07

Abstract: The generation of tunably focused light at remote locations is a critical photonic functionality for a wide range of applications. Here, we present a novel concept in the emerging field of Metafibers that achieves, for the first time, fast, alignment-free, fiber-integrated spatial focus control in a monolithic arrangement. This is enabled by 3D nanoprinted intensity-sensitive phase-only on-fiber holograms, which establish a direct correlation between the intensity distribution in the hologram plane and the focus position. Precise adjustment to the relative power between the modes of a dual-core fiber generates a power-controlled interference pattern within the hologram, enabling controlled and dynamic focus shifts. This study addresses all relevant aspects, including computational optimization, advanced 3D nanoprinting, and tailored fiber fabrication. Experimental results supported by simulations validate the feasibility and efficiency of this monolithic Metafiber platform, which enables fast focus modulation and has transformative potential in optical manipulation, high-speed laser micromachining, telecommunications, and minimally invasive surgery.

DOI: 10.1038/s41377-025-01903-0

Source: https://www.nature.com/articles/s41377-025-01903-0