3D-printed fiber-based zeroth- and high-order Bessel beam generator

Bessel beams (BBs) have gained prominence thanks to their diffraction-free propagation and self-healing properties. These are conventionally generated using different approaches, namely by transforming a narrow circular beam with lens, axicons or holographic beam-shaping techniques. methods involve space-consuming optics. To overcome this limitation, in the past, efforts been made create BBs directly from optical fibers. However, these solutions limited capability generate on-demand parameters only focused on creating zeroth-order BBs. Here, we propose photonic structure that uses stacked miniaturized elements 3D printed single step fiber facet. Our design allows for generation of both zeroth- high-order fully controllable tailoring beams’ parameters, such as distance width central peak node. Remarkably, report first time, best our knowledge, We expect approach be useful applications quantum communications, fiber-based sensors, microscopy, spectroscopy, trapping.