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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.
Papers
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Proceedings ArticleDOI
Nonlinearity and disorder in two-dimensional fiber arrays
Thomas Pertsch,Ulf Peschel,Stefan Nolte,Andreas Tünnermann,Falk Lederer,Jens Kobelke,Kay Schuster,Hartmut Bartelt +7 more
TL;DR: In this article, diffusive wave propagation in disordered two-dimensional arrays of interacting optical fibers was observed. But the authors did not consider the effect of weak Kerr nonlinearity on the mobility of the fibers.
Proceedings ArticleDOI
Long-period gratings written in large-mode area photonic crystal fiber
TL;DR: In this paper, the fabrication and characterization of CO2-laser written long-period gratings in a large-mode area photonic crystal fiber with a core diameter of 25 µm was reported.
Proceedings ArticleDOI
The impact of photodarkening on mode instabilities in high-power fiber laser systems
Cesar Jauregui,Hans-Jürgen Otto,Norbert Modsching,Oliver de Vries,Jens Limpert,Andreas Tünnermann +5 more
TL;DR: In this article, the impact of photodarkening on mode instabilities in high-power fiber laser systems is discussed and it is shown that even very small amounts of photoderarkening can lead to a very significant increase of the heat load in high power fiber-laser systems.
Proceedings ArticleDOI
Detailed investigations on femtosecond-induced modifications in crystalline quartz for integrated optical applications
TL;DR: In this paper, femtosecond laser induced modifications in crystalline quartz are investigated and the authors show that the irradiated amorphous core creates a stress field in the surrounding material that possesses a positive index change and therefore supports the guiding of light.
Journal ArticleDOI
High power sub-ps pulse generation by compression of a frequency comb obtained by a nonlinear broadened two colored seed
Marco Plötner,Victor Bock,Tim Schultze,Franz Beier,Thomas Schreiber,Ramona Eberhardt,Andreas Tünnermann +6 more
TL;DR: This work demonstrates the generation of a frequency comb of several nm widths with arbitrary frequency spacing by four-wave-mixing (FWM) of two external cavity lasers combined amplified in a high power large-mode area fiber amplifier.