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
Proceedings ArticleDOI
On the thermal origin of mode instabilities in high power fiber lasers
Cesar Jauregui,Tino Eidam,Tino Eidam,Hans-Jürgen Otto,Fabian Stutzki,Florian Jansen,Jens Limpert,Jens Limpert,Andreas Tünnermann,Andreas Tünnermann,Andreas Tünnermann +10 more
TL;DR: In this article, the authors present simulations on the temperature profile inside of a large mode area fiber in high power operation with mode interference and show that the pump power is not homogeneously absorbed along the fiber, which in turn gives rise to an oscillating temperature profile.
Proceedings ArticleDOI
Ultra-compact imaging system based on multi-aperture architecture
TL;DR: In this paper, the authors proposed a multi-faceted camera system with four different channels each consisting of four microlenses, arranged one after another in different microlens arrays, so that a real erect image is generated and a conventional image sensor can be used.
Proceedings ArticleDOI
Hybrid 400W Fiber-Innoslab fs-Amplifier
Peter Rußbüldt,T. Mans,G. Rotarius,Dieter Hoffmann,Reinhart Poprawe,Tino Eidam,Jens Limpert,Andreas Tünnermann +7 more
TL;DR: In this paper, a combination of fiber and Innoslab technology enables up to 420W average output power at almost diffraction limited beam quality at 1MHz and 100kHz repetition rate.
Proceedings ArticleDOI
1 kW narrow-linewidth fiber amplifier for spectral beam combining
C. Wirth,Oliver Schmidt,I. Tsybin,Thomas Schreiber,Jens Limpert,Ramona Eberhardt,Andreas Tünnermann +6 more
TL;DR: In this paper, a narrow linewidth fiber amplifier system emitting a total output power of 1 kW was presented, which was used to limit nonlinear effects like stimulated Raman and Brillouin scattering as well as self-phase modulation.
Journal ArticleDOI
Pound–Drever–Hall error signals for the length control of three-port grating coupled cavities
Michael Britzger,Daniel Friedrich,Stefanie Kroker,Frank Brückner,Oliver Burmeister,Ernst-Bernhard Kley,Andreas Tünnermann,Karsten Danzmann,Roman Schnabel +8 more
TL;DR: This work experimentally demonstrates that the problem of asymmetric resonance profile in three-port grating coupled cavities is solved by the detection of light at both reflection ports of the cavity and the postprocessing of the two demodulated electronic signals.