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The conventional way of generating Bessel beams (BBs) is based on axicon and other diffractive optical elements such as light modulators. These methods involve space-consuming optics. To overcome this limitation, over the past years, efforts were made to create BBs using miniaturized optics and generation of BBs directly from optical fibers. We propose a novel photonic structure 3D micro-printed on the end-face of an optical fiber, generating BBs of various orders. With our approach, we report for the first time the generation of high-order BBs from optical fibers. The results showcase Bessel beams ranging from orders zero- to 20.
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Innem Venkata Anudeep Kumar Reddy, Andrea Bertoncini, Carlo Liberale, "On-fiber 3D micro-printed photonic structure for Gaussian to zero- and high-order Bessel beam generation," Proc. SPIE PC12017, Complex Light and Optical Forces XVI, PC120170K (9 March 2022); https://doi.org/10.1117/12.2607974