A
Andreas Tünnermann
Researcher at Fraunhofer Society
Publications - 1757
Citations - 48543
Andreas Tünnermann is an academic researcher from Fraunhofer Society. The author has contributed to research in topics: Fiber laser & Laser. The author has an hindex of 97, co-authored 1738 publications receiving 43757 citations. Previous affiliations of Andreas Tünnermann include Schiller International University & University of Jena.
Papers
More filters
Journal ArticleDOI
High average power Q-switched second harmonic generation with diode-pumped Nd:YAG laser
TL;DR: In this article, the authors reported reliable single-pass second harmonic generation of more than 400 mW of 532 nm average power from a compact, all-solid state non-planar ring Q-switched Nd:YAG laser.
Proceedings ArticleDOI
Experimental analysis of the influence of the spectral width of out-coupling Fiber Bragg Gratings to the amount of Stimulated Raman Scattering in a cw kW fiber oscillator
Andreas Liem,Erik Freier,Christian Matzdorf,Volker Reichel,Thomas Schreiber,Ramona Eberhardt,Andreas Tünnermann +6 more
TL;DR: In this article, the spectral behavior of a LMA cw kW fiber oscillator was measured depending on the spectral width of the out coupling FBGs (0.04 nm, 0.5 and 1.5 nm).
Journal ArticleDOI
High-resolution sequential thermal fringe projection technique for fast and accurate 3D shape measurement of transparent objects.
Martin Landmann,Henri Speck,Patrick Dietrich,Stefan Heist,Peter Kühmstedt,Andreas Tünnermann,Gunther Notni +6 more
TL;DR: In this paper, a method based on stereo recording with infrared cameras and projection of areal aperiodic sinusoidal thermal patterns was proposed to detect transparent objects, which can reduce measurement time and significantly increase measurement quality.
Proceedings ArticleDOI
Diffractive optical elements based on subwavelength high-contrast gratings
Stefanie Kroker,Thomas Käsebier,Thomas Weber,Stefan Steiner,Frank Fuchs,Ernst-Bernhard Kley,Andreas Tünnermann,Andreas Tünnermann +7 more
TL;DR: In this paper, a diffracting period is superposed to a highly reflective subwavelength grating in order to realize diffractive elements, which can be realized with a periodic depth, fill factor or period modulation of the reflector.