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We present a fiber-based 3D printing system with the highest printing resolution. Fabricated lines and microstructures are presented too. A microlens (NA 0.9) is printed in the Nanoscribe 3D-printer and attached to the fiber. A femtosecond laser (780nm, 80MHz) is used for two-photon polymerization and the focused spot on the tip of the lens is generated by wavefront shaping with the Transmission Matrix method. The spot size (lens with NA 0.9) is compared to the spot size of the fiber (NA 0.29) and to the spot size obtained when a commercially available microlens is attached (NA 0.54). Exposure tests are conducted by printing lines or voxels on a photosensitive resin and finally a prepared high aspect ratio structure is used for demonstrating the utility of a fiber-3D printing system to reach confined areas for microfabrication.
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