B
Bettina Sattler
Researcher at Fraunhofer Society
Publications - 15
Citations - 382
Bettina Sattler is an academic researcher from Fraunhofer Society. The author has contributed to research in topics: Single-mode optical fiber & Fiber. The author has an hindex of 7, co-authored 15 publications receiving 303 citations.
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Journal ArticleDOI
Single mode 4.3 kW output power from a diode-pumped Yb-doped fiber amplifier.
Franz Beier,Christian Hupel,Stefan Kuhn,Sigrun Hein,Johannes Nold,F Proske,Bettina Sattler,Andreas Liem,Cesar Jauregui,Jens Limpert,Nicoletta Haarlammert,Thomas Schreiber,Ramona Eberhardt,Andreas Tünnermann +13 more
TL;DR: A high slope efficiency of 90% with diffraction-limited beam quality and without any sign of TMI or stimulated Raman scattering for a spectral dynamic range of higher than -80 dB was obtained.
Journal ArticleDOI
Narrow linewidth, single mode 3 kW average power from a directly diode pumped ytterbium-doped low NA fiber amplifier
Franz Beier,Christian Hupel,Johannes Nold,Stefan Kuhn,Sigrun Hein,J Ihring,Bettina Sattler,Nicoletta Haarlammert,Thomas Schreiber,Ramona Eberhardt,Andreas Tünnermann +10 more
TL;DR: A newly designed and fabricated ytterbium-doped large mode area fiber with an extremely low NA and related systematic investigations on fiber parameters that crucially influence the mode instability threshold are reported on.
Journal ArticleDOI
Experimental investigations on the TMI thresholds of low-NA Yb-doped single-mode fibers
Franz Beier,Friedrich Möller,Bettina Sattler,Johannes Nold,Andreas Liem,Christian Hupel,Stefan Kuhn,Sigrun Hein,Nicoletta Haarlammert,Thomas Schreiber,Ramona Eberhardt,Andreas Tünnermann +11 more
TL;DR: This contribution investigates the transversal mode instability behavior of a ytterbium-doped commercial 20/400 fiber and obtains 2.9 kW of output power after optimizing the influencing parameters.
Journal ArticleDOI
Optimizing mode instability in low-NA fibers by passive strategies.
Nicoletta Haarlammert,Bettina Sattler,Andreas Liem,Maximilian Strecker,Johannes Nold,Thomas Schreiber,Ramona Eberhardt,Andreas Tünnermann,Klaus Ludewigt,Markus Jung +9 more
TL;DR: The MI threshold was found to sensitively depend on theV-parameter for large V-parameters (>2), but to be robust for smaller V- parameters, which represents a new record output power for narrow linewidth fiber amplifiers.
Journal ArticleDOI
Measuring thermal load in fiber amplifiers in the presence of transversal mode instabilities.
Franz Beier,Marco Plötner,Bettina Sattler,Fabian Stutzki,Till Walbaum,Andreas Liem,Nicoletta Haarlammert,T. Schreiber,Ramona Eberhardt,Andreas Tünnermann +9 more
TL;DR: Detailed in situ distributed temperature measurements inside a high power fiber amplifier show that photodarkening has a negligible impact on the thermal load and, therefore, on the TMI threshold in this fiber.