J
Johannes Nold
Researcher at Fraunhofer Society
Publications - 39
Citations - 610
Johannes Nold is an academic researcher from Fraunhofer Society. The author has contributed to research in topics: Fiber & Fiber laser. The author has an hindex of 10, co-authored 39 publications receiving 452 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
Efficient Raman frequency conversion of high‐power fiber lasers in diamond
Robert J. Williams,Johannes Nold,Maximilian Strecker,Ondrej Kitzler,Aaron McKay,Thomas Schreiber,Richard P. Mildren +6 more
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
Laser cooling of ytterbium-doped silica glass
Esmaeil Mobini,Saeid Rostami,Mostafa Peysokhan,Alexander R. Albrecht,Stefan Kuhn,Sigrun Hein,Christian Hupel,Johannes Nold,Nicoletta Haarlammert,Thomas Schreiber,Ramona Eberhardt,Andreas Tünnermann,Andreas Tünnermann,Mansoor Sheik-Bahae,Arash Mafi +14 more
TL;DR: In this article, the authors show the net cooling of high-purity Yb-doped silica glass samples that are fabricated with low impurities to reduce their parasitic background loss for fiber laser applications.