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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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Proceedings ArticleDOI
All-fiber Side Pump Combiner for High Power Fiber Lasers and Amplifiers
TL;DR: In this paper, a side-pump combiner for high-power fiber lasers and amplifiers is presented, which consists of a capillary with decreasing wall thickness fused around the active fiber in a way that it becomes an additional cladding layer of it.
Journal ArticleDOI
A normal-incidence PtSi photoemissive detector with black silicon light-trapping
Martin Steglich,Matthias Zilk,Astrid Bingel,Christian Patzig,Thomas Käsebier,Frank Schrempel,Ernst-Bernhard Kley,Andreas Tünnermann +7 more
TL;DR: In this paper, a normal-incidence light-trapping scheme relying on black silicon surface nanostructures for Si-based photoemissive detectors, operating in the IR spectral range, is proposed.
Proceedings Article
High power linearly polarized fiber laser
Andreas Liem,Jens Limpert,Thomas Schreiber,M. Reich,Holger Zellmer,Andreas Tünnermann,A. Carter,K. Tankala +7 more
TL;DR: In this article, a linearly polarized (extinction ratio ~17 dB) largemode-area fiber laser with an output power above 300 W and diffraction-limited beam quality was reported.
Journal ArticleDOI
Implementation of Laser-Induced Anti-Stokes Fluorescence Power Cooling of Ytterbium-Doped Silica Glass.
Mostafa Peysokhan,Saeid Rostami,Esmaeil Mobini,Alexander R. Albrecht,Stefan Kuhn,Sigrun Hein,Christian Hupel,Johannes Nold,Nicoletta Haarlammert,Thomas Schreiber,Ramona Eberhardt,Angel Flores,Andreas Tünnermann,Andreas Tünnermann,Mansoor Sheik-Bahae,Arash Mafi +15 more
TL;DR: More than 6 K of cooling below the ambient temperature is reported, which is the lowest temperature achieved in solid-state laser cooling of silica glass to date to the best of the authors' knowledge.
Journal ArticleDOI
Continuously chirped fiber Bragg gratings by femtosecond laser structuring
Jens Thomas,Christian Voigtländer,Damian N. Schimpf,Fabian Stutzki,Elodie Wikszak,Jens Limpert,Stefan Nolte,Andreas Tünnermann +7 more
TL;DR: This work reports on what it believes to be the first successful inscription of continuously chirped fiber Bragg gratings (CCFBG) into a nonphotosensitive single-mode fiber (SMF) with near-IR femtosecond laser pulses.