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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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Energetic sub-2-cycle laser with 220 W average power
Steffen Hädrich,Marco Kienel,Michael Müller,Arno Klenke,Jan Rothhardt,Robert Klas,Thomas Gottschall,Tino Eidam,András Drozdy,Péter Jójárt,Zoltán Várallyay,Eric Cormier,Karoly Osvay,Andreas Tünnermann,Jens Limpert +14 more
TL;DR: In this paper, two-stage nonlinear compression of a 660 W femtosecond fiber laser system is utilized to achieve unprecedented average power levels of energetic ultrashort or even few-cycle laser pulses.
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Improved Modal Reconstruction for Spatially and Spectrally Resolved Imaging $({\rm S}^{2})$
Hans-Jürgen Otto,Florian Jansen,Fabian Stutzki,Cesar Jauregui,Jens Limpert,Andreas Tünnermann +5 more
TL;DR: This work presents several algorithms that significantly improve the accuracy of modal reconstruction for weak excited fundamental mode content, and shows that in some cases general analytical solutions exist that can completely overcome the former limitation.
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Demonstration of a cavity coupler based on a resonant waveguide grating
Frank Brückner,Daniel Friedrich,Tina Clausnitzer,Oliver Burmeister,Michael Britzger,Ernst-Bernhard Kley,Karsten Danzmann,Andreas Tünnermann,Roman Schnabel +8 more
TL;DR: A cavity coupler based on a surface relief guided ode resonant grating is presented, which is expected to provide low mechanical loss and, thus, low thermal noise in multilayer optical coatings.
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Experimental comparison of aperiodic sinusoidal fringes and phase-shifted sinusoidal fringes for high-speed three-dimensional shape measurement
Stefan Heist,Stefan Heist,Peter Kühmstedt,Andreas Tünnermann,Andreas Tünnermann,Gunther Notni,Gunther Notni +6 more
TL;DR: In this article, the authors compare two illumination approaches, aperiodic sinusoidal fringes and phase-shifted fringes, with regard to the achievable point cloud completeness and accuracy depending on the pattern parameters and sequence length.
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Silicon wire grid polarizer for ultraviolet applications.
TL;DR: A silicon wire grid polarizer operating down to a wavelength of 300 nm is presented, realized by means of electron beam lithography and dry etching using amorphous silicon as the grating material.