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Here, a multicore fiber functionalized with a 3D\u2010printed hologram for the reconfigurable generation of structured light distributions is demonstrated. A computationally optimized 3D\u2010printed phase\u2010only hologram maps the fields emitted by the individual fiber cores onto prescribed output field distributions. By exciting different combinations of cores, these distributions can be combined into various reconfigurable light patterns. The concept is demonstrated by generating seven\u2010segment digits, which clearly illustrate the possibility of programmable pattern formation. The hologram is fabricated by high\u2010resolution 3D nanoprinting on a spacer integrated with the fiber facet, enabling beam expansion before wavefront shaping. Systematic optical characterization confirms reliable image formation and shows that the generated patterns are robust to variations in the relative phases between cores. The approach provides a compact and remotely addressable route to structured illumination, with potential applications in life sciences, telecommunications, and integrated photonics.<\/jats:p>","DOI":"10.1002\/nap2.70332","type":"journal-article","created":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T07:19:11Z","timestamp":1792394351000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Reconfigurable Light Field Generation With Hologram\u2010Enhanced Multicore Fibers"],"prefix":"10.1002","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-5078-6684","authenticated-orcid":false,"given":"Mohammadhossein","family":"Khosravi","sequence":"first","affiliation":[{"name":"Leibniz Institute of Photonic Technology  Jena Germany"},{"name":"Abbe Center of Photonics and Faculty of Physics Friedrich\u2010Schiller\u2010University Jena  Jena 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