Sun Jun, Huang Wenqin, Lorenz Adrian, Zeisberger Matthias, Schmidt Markus A
Department of Fiber Photonics, Leibniz Institute of Photonic Technology, 07745, Jena, Germany.
Abbe Center of Photonics and Faculty of Physics, Friedrich-Schiller-University Jena, 07743, Jena, Germany.
Light Sci Appl. 2025 Jul 7;14(1):237. doi: 10.1038/s41377-025-01903-0.
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.
在远程位置产生可调谐聚焦光对于广泛的应用来说是一种关键的光子功能。在此，我们在新兴的超纤维领域提出了一种新颖的概念，首次在单片结构中实现了快速、无需对准、光纤集成的空间聚焦控制。这是通过3D纳米打印的仅强度敏感的光纤全息图实现的，这些全息图在全息图平面中的强度分布与聚焦位置之间建立了直接关联。对双核光纤模式之间的相对功率进行精确调整会在全息图内产生功率可控的干涉图案，从而实现可控的动态聚焦偏移。本研究涉及所有相关方面，包括计算优化、先进的3D纳米打印和定制光纤制造。模拟支持的实验结果验证了这种单片超纤维平台的可行性和效率，该平台能够实现快速聚焦调制，并且在光学操纵、高速激光微加工、电信和微创手术中具有变革潜力。
