F. Beirow, M. Eckerle, B. Dannecker, T. Dietrich, M. Abdou Ahmed, and T. Graf, “Radially polarized passively mode-locked thin-disk laser oscillator emitting sub-picosecond pulses with an average output power exceeding the 100 W level,” Optics Express, vol. 26, no. 4, p. 10, 2018.
B. Dannecker, M. Rumpel, T. Graf, and M. A. Ahmed, “Trimming method for a high-yield manufacturing of high-efficiency diffraction gratings,” Opt. Lett., vol. 43, no. 16, pp. 4017--4020, 2018.
B. Dannecker et al., “Exploiting nonlinear spectral broadening in a 400 W Yb:YAG thin-disk multipass amplifier to achieve 2 mJ pulses with sub-150 fs duration,” Optics Communications, vol. 429, pp. 180--188, 2018.
T. Dietrich et al., “Thin-disk oscillator delivering radially polarized beams with up to 980 W of CW output power,” Optics Letters, vol. 43, no. 6, 2018.
S. Faas, U. Bielke, R. Weber, and T. Graf, “Prediction of the surface structures resulting from heat accumulation during processing with picosecond laser pulses at the average power of 420 W,” Applied Physics A, vol. 124, no. 9, p. 612, 2018.
S. Faas, D. J. Foerster, R. Weber, and T. Graf, “Determination of the thermally induced focal shift of processing optics for ultrafast lasers with average powers of up to 525 W,” Opt. Express, vol. 26, no. 20, pp. 26020--26029, 2018.
F. Fetzer, H. Hu, P. Berger, R. Weber, P. Eberhard, and T. Graf, “Fundamental investigations on the spiking mechanism by means of laser beam welding of ice,” Journal of Laser Applications, vol. 30, no. 1, pp. 012009-1-012009–9, 2018.
F. Fetzer, M. Sommer, R. Weber, J.-P. Weberpals, and T. Graf, “Reduction of pores by means of laser beam oscillation during remote welding of AlMgSi,” Optics and Lasers in Engineering, vol. 108, pp. 68--77, 2018.
F. Fetzer, C. Hagenlocher, and R. Weber, “High Power, High Speed, High Quality: Advantages of laser beam welding of aluminum sheets at 16 kW of laser power and feed rates up to 50 m/min,” Laser Technik Journal, vol. 15, no. 3, pp. 28--31, 2018.
C. Freitag et al., “Residual heat generated during laser processing of CFRP with picosecond laser pulses,” Adanced Optical Technologies, 2018.
D. J. Förster et al., “Shielding effects and re-deposition of material during processing of metals with bursts of ultra-short laser pulses,” Applied Surface Science, vol. 440, pp. 926–931, 2018.
D. J. Förster, R. Weber, D. Holder, and T. Graf, “Estimation of the depth limit for percussion drilling with picosecond laser pulses,” Opt. Express, vol. 26, no. 9, pp. 11546--11552, 2018.
C. Hagenlocher, F. Fetzer, R. Weber, and T. Graf, “Benefits of very high feed rates for laser beam welding of AlMgSi aluminum alloys,” Journal of Laser Applications, vol. 30, no. 1, pp. 012015--, 2018.
C. Hagenlocher, M. Sommer, F. Fetzer, R. Weber, and T. Graf, “Optimization of the solidification conditions by means of beam oscillation during laser beam welding of aluminum,” Materials & Design, vol. 160, pp. 1178–1185, 2018.
C. Hagenlocher, D. Weller, R. Weber, and T. Graf, “Reduction of the hot cracking susceptibility of laser beam welds in AlMgSi alloys by increasing the number of grain boundaries,” Science and Technology of Welding and Joining, vol. 24, no. 4, pp. 313–319, 2018.
C. Hagenlocher, P. Stritt, R. Weber, and T. Graf, “Strain signatures associated to the formation of hot cracks during laser beam welding of aluminum alloys,” Optics and Lasers in Engineering, vol. 100, pp. 131--140, 2018.
C. Hagenlocher, M. Seibold, R. Weber, and T. Graf, “Modulation of the local grain structure in laser beam welds to inhibit the propagation of centerline hot cracks,” Procedia CIRP, vol. 74, pp. 434--437, 2018.
M. Jarwitz, F. Fetzer, R. Weber, and T. Graf, “Weld Seam Geometry and Electrical Resistance of Laser-Welded, Aluminum-Copper Dissimilar Joints Produced with Spatial Beam Oscillation,” Metals, vol. 8, no. 7, p. 510, 2018.
T. Kononenko, C. Freitag, M. Komlenok, R. Weber, T. Graf, and V. Konov, “Heat accumulation between scans during multi-pass cutting of carbon fiber reinforced plastics,” Applied Physics A, vol. 124, p. 217, 2018.
T. Kononenko, C. Freitag, D. Sovyk, A. Lukhter, K. Skvortsov, and V. Konov, “Influence of pulse repetition rate on percussion drilling of Ti-based alloy by picosecond laser pulses,” Optics and Lasers in Engineering, vol. 103, pp. 65–70, 2018.
A. Kroschel, M. Andreas, and G. Thomas, “Model of the final borehole geometry for helical laser drilling,” Advanced Optical Technologies, vol. 7, no. 3, pp. 183–188, 2018.
A. Kroschel, A. Michalowski, F. Bauer, and T. Graf, “Calculating the Borehole Geometry Produced by Helical Drilling with Ultrashort Laser Pulses,” JLMN-Journal of Laser Micro/Nanoengineering, vol. 13, no. 3, pp. 263–267, 2018.
R.-A. Lorbeer, J. Pastow, M. Sawannia, P. Klinkenberg, D. J. Förster, and H.-A. Eckel, “Power Spectral Density Evaluation of Laser Milled Surfaces,” Materials, vol. 11, no. 1, 2018.
K. Schmidt, P. Wittmüß, S. Piehler, M. Abdou Ahmed, T. Graf, and O. Sawodny, “Modellierung optisch adressierter Spiegel für adaptive Hochleistungslaser,” at-Automatisierungstechnik, vol. 66, no. 7, pp. 506–520, 2018.
K. Schmidt, P. Wittmuess, S. Piehler, M. Abdou Ahmed, T. Graf, and O. Sawodny, “Modeling and simulating the thermoelastic deformation of mirrors using transient multilayer models,” Mechatronics, vol. 53, pp. 168–180, 2018.
S. Schmidt et al., “The next generation of laser spectroscopyexperiments using light muonic atoms,” Journal of Physics, vol. Conf. Series, no. 1138, pp. 1–17, 2018.
D. Weller, C. Hagenlocher, T. Steeb, R. Weber, and T. Graf, “Self-restraint hot cracking test for aluminum alloys using digital image correlation,” Procedia CIRP, vol. 74, pp. 430--433, 2018.