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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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Journal ArticleDOI
Power scaling of a high-repetition-rate enhancement cavity.
Ioachim Pupeza,Tino Eidam,Jens Rauschenberger,Birgitta Bernhardt,Akira Ozawa,Ernst E. Fill,Alexander Apolonski,Thomas Udem,Jens Limpert,Zeyad A. Alahmed,Abdallah M. Azzeer,Andreas Tünnermann,Theodor W. Hänsch,Ferenc Krausz +13 more
TL;DR: A passive optical resonator is used to enhance the power of a pulsed 78 MHz repetition rate Yb laser providing 200 fs pulses and limitations relating to the achievable time-averaged and peak power are found, which are distinguished by varying the duration of the input pulses.
Journal ArticleDOI
Passive mitigation strategies for mode instabilities in high-power fiber laser systems.
Cesar Jauregui,Hans-Jürgen Otto,Fabian Stutzki,Florian Jansen,Jens Limpert,Andreas Tünnermann +5 more
TL;DR: Experimental approaches to control mode instabilities at average output powers higher than 330 W, which corresponds to three times the typical power threshold of the fiber laser system in use, is presented.
Journal ArticleDOI
High-average-power picosecond Yb-doped fiber amplifier.
Jens Limpert,Andreas Liem,T. Gabler,Holger Zellmer,Andreas Tünnermann,Sonja Unger,Sylvia Jetschke,H.-R. Muller +7 more
TL;DR: A cladding-pumped, ytterbium-doped large-core-area fiber amplifier that is capable of generating 51.2 W of average power at a 1064-nm center wavelength, an 80-MHz repetition rate, and a 10-ps pulse duration is reported.
Journal ArticleDOI
Ultrafast laser processing: New options for three-dimensional photonic structures
TL;DR: In this article, the authors presented a new approach using a fiber-based femtosecond laser system producing 300 fs pulses with pulse energies of 0.6 μJ at 2 MHz repetition rate.
Journal ArticleDOI
High-gain quantum-dot semiconductor optical amplifier for 1300 nm
TL;DR: Using an AlGaAs-GaAs waveguide structure with a six-stack InAs-InGaAs "dots-in-a-well" (DWELL) gain region having an aggregate dot density of approximately 8/spl times/10/sup 11/ cm/sup -2/, an optical gain of 18 dB at 1300 nm was obtained in a 2.4mm-long amplifier at 100-mA pump current.