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Q: Fachverband Quantenoptik und Photonik
Q 77: Photonics – 3D Printing
Q 77.7: Vortrag
Freitag, 6. März 2026, 16:00–16:15, P 2
Fiber-based femtosecond 3D printing — •Anton Hellstern1, Claudia Imiolczyk1, Pavel Ruchka1, Marco Wende2, Theresa Kühn3, Moritz Flöß1, Michael Heymann3, Andrea Toulouse2, and Harald Giessen1 — 14th Physics Institute, University of Stuttgart, Germany — 2Institute of Applied Optics, University of Stuttgart, Germany — 3Institute of Biomaterials and Biomolecular Systems, University of Stuttgart, Germany
Ultrashort laser pulses are often used in medical applications, for instance for soft-tissue surgeries. However, the progress on using such laser pulses for additive manufacturing of tissue is rather marginal so far. Therefore, we aim to realize an endoscopic fiber-based femtosecond 3D printer to minimally invasively surgically repair organ damage on a micrometer scale. For this, high peak power femtosecond laser pulses are required, in order to 3D print the desired geometries using two-photon-lithography. By combining a grating compressor, a single-mode fiber, and suitable 3D printed microobjetives directly on the fiber tip, we achieve sub picosecond pulse durations which are able to polymerize both commercial photopolymers as well as bioinks. We report on dose tests, the optimization of printing speed, laser power, pulse compression ratio, and pulse duration. We demonstrate cell colonization of triply periodic minimal surface structures that represent scaffolds by printing 3D honeycombs and seeding them with living fibroblasts. This direct printing of cell scaffolds by endoscopic 3D printing will allow for endoscopic printing of bone tissue inside the body in the future.
Keywords: 3D Printing; Dispersion compensation; Pulse compression; Bio application; Fiber based