Metafibers for Simultaneous Generation of Orbital Angular Momentum Beams via On-Fiber 3D Nanoprinted Holograms

The generation of complex light beams is central to many areas of science and technology. In this work, we introduce a novel metafiber capable of simultaneously generating multiple orbital angular momentum (OAM) beams with tailored topological orders and diffraction angles. Our approach is based on high-quality on-fiber 3D nanoprinted holograms that efficiently produce multiple OAM beams with experimental results in close agreement with theoretical predictions. By integrating an innovative design strategy with advanced on-fiber fabrication and systematic characterization, we demonstrate the robustness and versatility of this metafiber platform for generating beams with helical-phase fronts. This work not only advances the understanding of structured light in fiber-integrated systems but also highlights the potential of metafibers for applications in telecommunications, quantum technologies, optical manipulation, and sensing.