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Tangential laser turning of fused silica usin ultra-short laser pulses

Wednesday (24.06.2020)
13:28 - 13:31 Room 1
Part of:
- Poster Periodic microstructuring of metal moulds using direct laser interference patterning for nanoimprint replication 1 Dr. Marcos Soldera
- Poster Comparison of structural colors achieved by laser induced periodic surface structures and direct laser interference patterning 1 Dr. Marcos Soldera
- Poster *student* Wetting properties of the aluminium surface structures fabricated using Direct Laser Interference Patterning with picosecond and femtosecond pulses 1 Dipl.-Ing. Stephan Milles
- Poster The numerical realization of a model of interaction of ultrashort laser pulses with solid 1 Prof. Vladimir Zhukov
- Poster On the problem of the initial conditions for tightly-focused ultrashort laser pulses in the modeling of laser beam propagation in transparent solids 1 Prof. Vladimir Zhukov
- Poster Innovative polymer coating systems – applied by laser sintering technique 1 Dr. Anna Buling
- Poster Tangential laser turning of fused silica usin ultra-short laser pulses 1 Julian Zettl
- Poster Process optimization of Direct Laser Interference Patterning 1 Dr. Bogdan Voisiat
- Poster Dynamic aberration correction via spatial light modulator (SLM) for femtosecond direct laser writing 1 Gabrielius Kontenis
- Poster Modification of metal nanoparticles via femtosecond laser pulses and their application for SERS 1 Dr. Asta Tamuleviciene
- Poster Ultraviolet and Infrared Femtosecond Laser Irradiation of Thermoplastics PET and PA66 1 Dr. Xxx Sedao
- Poster High pulse energy femtosecond laser machining station for the interference and parallel processing 1 Dr. Simonas Indrisiunas
- Poster Laser material processing with a multi-beam setup based on Excited State Absorption 1 Sebastian Engel
- Poster GO-neutral red nanocomposite reduction by pulsed laser irradiation 1 Dr. Romualdas Trusovas
- Poster *student* Numerical simulation of energy relaxation in Mo thin films exposed to femtosecond laser pulse 1 Kryštof Hlinomaz
- Poster Modification of medical-grade poly(L-lactide) using femtosecond laser filamentation 1 Dr. Bogusz Stepak
Session Chair

Session PS: Poster Session 02
Belongs to:
Topic PS: Poster Session

Laser turning with ultra-short laser pulses provides the possibility of manufacturing rotationally symmetric geometries even from hard to machine materials as fused silica. Due to its optical, thermal and mechanical properties, fused silica is used in different applications such as, e.g., optics, fiber optics, and semiconductor industry, respectively. Laser turning of fused silica offers a process for fabricating rotational symmetric parts down to a micrometer scale. In this laser micro machining approach, the laser beam is oriented perpendicularly to the rotational axis and tangentially to the material, whereas the target geometry is realized by moving the constantly rotating specimen according to the specified geometry under the focused laser spot. Due to the friction-less laser ablation it is possible to realize a turning process in fused silica without the use of a contacting tool and therefore without causing tensions in the work piece. The cutting head focuses the laser to a spot size of 16 µm in diameter and the applied processing gas pressure assists in removing the ablated material.

In this study, femto-second laser turning of fused silica with a diameter of 5 mm is investigated. The influence of rotation speed and focal spot size upon the overall process speed is stated. Furthermore, comprehensive parameter studies in order to optimize surface roughness and to find the maximum achievable ablation rate are shown. Limited by the mechanical speed of the rotational axis, the highest feasible ablation rate is 19.5 mm³/min. In addition, effects of a trepanning optic that moves the laser spot in a circular motion to spatially distribute the laser power upon the maximum laser feed rate are displayed. Lastly, an experimental series to examine the influence of the applied pulse energy upon the laser turning process is demonstrated.

Julian Zettl
University of Applied Science Aschaffenburg
Additional Authors:
  • Prof. Dr. Ralf Hellmann
    University of Applied Sciences Aschaffenburg


Category Short file description File description File Size
Extended Abstract 87 KB Download
Poster Version 1 Laser turning of fused silica. Study of ablation rate and efficiency for different pulse energies and trepanning diameters. 1 MB Download