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Physikingenieurwesen (PHY)

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Additional Plate Fixation of Hinge Fractures After Varisation Distal Femoral Osteotomies Provides Favorable Torsional Stability: A Biomechanical Study (2023)
Peez, Christian ; Grosse-Allermann, Arian ; Deichsel, Adrian ; Raschke, Michael J. ; Glasbrenner, Johannes ; Briese, Thorben ; Wermers, Jens ; Herbst, Elmar ; Kittl, Christoph
Glenoid Concavity Affects Anterior Shoulder Stability in an Active-Assisted Biomechanical Model (2024)
Oenning, Sebastian ; Wermers, Jens ; Taenzler, Stefanie ; Michel, Philipp A. ; Raschke, Michael J. ; Katthagen, J. Christoph
The Biomechanical Importance of Bone Block Positioning in Glenoid Augmentation: Every Millimeter Matters (2025)
Oenning, Sebastian ; Wermers, Jens ; Köhler, Alina ; Sußiek, Julia ; Wiethölter, Mats ; Raschke, Michael J. ; Katthagen, J. Christoph
Assessing the Need for Additional Syndesmotic Stabilization in Open Reduction of the Posterior Malleolus: A Biomechanical Study (2025)
Milstrey, Alexander ; Gartung, Stella ; Klimek, Matthias ; Wermers, Jens ; Raschke, Michael J. ; Ochman, Sabine
17-GHz self-starting Kerr-lens mode-locked monolithic titanium-sapphire laser (2025)
Fiehler, Torben ; Wewers, Marieke ; Wittrock, Ulrich
Unraveling the nanoscale structure of organic-inorganic hybrid materials (2025)
Johny, Jacob ; Anandaraj, Savarithai Jenani Louis ; Mehrmann, Carolin ; Wei, Xin ; Das, Ankita ; Scheer, Niklas ; Yang, Yuke ; Hetaba, Walid ; Ebbinghaus, Petra ; Simon, Ulrich ; Eichel, Rüdiger.A. ; Hausen, Florian ; Uphoff, Holger ; Mertins, Hans-Christoph ; Kampen, R. Kramer ; Tong, Yujin ; Rabe, Martin ; Leitner, Walter ; Bordet, Alexis ; Tesch, Marc Frederic
Second-order nonlocal shifts of scattered wave-packets: What can be measured by Goos-Hänchen and Imbert-Fedorov effects? (2024)
Morawetz, Klaus
17-GHz Kerr-lens Mode-locked Monolithic Ti:Sapphire Laser (2024)
Fiehler, Torben ; Wittrock, Ulrich
We present a self-starting Kerr-lens mode-locked monolithic Ti:sapphire laser generating nearly bandwidth-limited 196 fs pulses at 900 mW average output power with a pulse repetition rate of 16.9 GHz.
Pitfall in autocorrelation measurements of laser radiation (2024)
Fiehler, Torben ; Saraceno, Clara ; Steinmeyer, Günter ; Wittrock, Ulrich
Spectrally broad laser radiation from continuous wave (cw) lasers can exhibit second-order autocorrelation traces virtually indistinguishable from those of mode-locked lasers. Consequently, based only on autocorrelations, one might erroneously conclude that a cw laser is mode-locked. This pitfall in interpretation can be avoided by carefully characterizing radio frequency transients and spectra. However, optoelectronics are often too slow for lasers with an axial mode spacing in the multi-GHz range. Carefully evaluated autocorrelations then remain the last resort for validating mode locking. We demonstrate in detail what needs to be observed. We compare autocorrelation measurements and calculations of a mode-locked titanium-sapphire (Ti:Sa) laser with 76 MHz repetition rate and a spectrally broad monolithic cw Ti:Sa laser and devise a new, additional measurement to safeguard against misinterpretation of their autocorrelations.
The clinical impact of glenoid concavity and version on anterior shoulder stability (2024)
Oenning, Sebastian ; de Castillo, Clara ; Jacob, Elena ; Riegel, Arne ; Michel, Philipp A. ; Wermers, Jens ; Raschke, Michael J. ; Katthagen, J. Christoph
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