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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.
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Fabrication of ridge waveguides in zinc-substituted lithium niobate by means of ion-beam enhanced etching
Holger Hartung,Ernst-Berhard Kley,Andreas Tünnermann,Thomas Gischkat,Frank Schrempel,Werner Wesch +5 more
TL;DR: Ridge waveguides in zinc-substituted lithium niobate were fabricated by a combination of liquid-phase epitaxy and multiple applications of ion-beam enhanced etching to realize a very low side-wall roughness and a rectangle shape close to 90 degrees.
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Ultraslim fixed pattern projectors with inherent homogenization of illumination
TL;DR: A multichannel approach, called "array projector," is introduced, which breaks this constraint, thus enabling the realization of ultraslim but high flux systems with inherent homogenization for still image content.
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Thermodynamic control of soliton dynamics in liquid-core fibers
Mario Chemnitz,Ramona Scheibinger,Christian Gaida,Martin Gebhardt,Fabian Stutzki,Sebastian Pumpe,Jens Kobelke,Andreas Tünnermann,Jens Limpert,Markus A. Schmidt +9 more
TL;DR: In this paper, temperature and pressure tuning of liquid-core carbon disulfide/silica fibers is used to control soliton dynamics and supercontinuum generation in the near-infrared, monitored via spectral location and the onset energy of non-solitonic radiation.
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Direct observation of Landau-Zener tunneling in a curved optical waveguide coupler
Felix Dreisow,Alexander Szameit,Matthias Heinrich,Stefan Nolte,Stefan Nolte,Andreas Tünnermann,Andreas Tünnermann,Marco Ornigotti,Stefano Longhi +8 more
TL;DR: In this paper, an electromagnetic realization of Landau-Zener (LZ) tunneling is experimentally demonstrated in femtosecond-laser written waveguide couplers with a cubically bent axis.
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Formation of periodic disruptions induced by heat accumulation of femtosecond laser pulses
TL;DR: A model is suggested explaining the formation of these disruptions as a results of a fast quenching process of the molten material after the laser irradiation has stopped.