no code implementations • 29 Jan 2021 • Till Walbaum, Matthias Heinzig, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann
We report on a monolithic thulium fiber laser with 567 W output power at 1970 nm, which is the highest power reported so far directly from a thulium oscillator.
Optics
no code implementations • 29 Jan 2021 • Franz Beier, Marco Plötner, Bettina Sattler, Fabian Stutzki, Till Walbaum, Andreas Liem, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann
We report on detailed in-situ distributed temperature measurements inside a high power fiber amplifier.
Optics
no code implementations • 21 Jan 2021 • Michael Müller, Arno Klenke, Thomas Gottschall, Robert Klas, Carolin Rothhardt, Stefan Demmler, Jan Rothhardt, Jens Limpert, Andreas Tünnermann
We present an ultrafast fiber laser system delivering 4. 6 W average power at 258 nm based on two-stage fourth-harmonic generation in beta barium borate (BBO).
Optics
no code implementations • 21 Jan 2021 • Michael Müller, Marco Kienel, Arno Klenke, Thomas Gottschall, Evgeny Shestaev, Marco Plötner, Jens Limpert, Andreas Tünnermann
An ultrafast fiber chirped-pulse amplifier comprising 8 coherently combined amplifier channels is presented.
Optics
no code implementations • 21 Jan 2021 • Michael Müller, Arno Klenke, Albrecht Steinkopff, Henning Stark, Andreas Tünnermann, Jens Limpert
An ultrafast laser based on coherent beam combination of four ytterbium-doped step-index fiber amplifiers is presented.
Optics
no code implementations • 21 Jan 2021 • Henning Stark, Michael Müller, Marco Kienel, Arno Klenke, Jens Limpert, Andreas Tünnermann
A pulse burst, cut out of the pulse train of a mode-locked oscillator, is amplified and temporally combined into a single pulse.
Optics
no code implementations • 21 Jan 2021 • Michael Müller, Christopher Aleshire, Arno Klenke, Elissa Haddad, François Légaré, Andreas Tünnermann, Jens Limpert
An ultrafast laser delivering 10. 4 kW average output power based on coherent combination of twelve stepindex fiber amplifiers is presented.
Optics
no code implementations • 21 Jan 2021 • Arno Klenke, Michael Müller, Henning Stark, Andreas Tünnermann, Jens Limpert
We present a novel phase locking scheme for the coherent combination of beam arrays in the filled aperture configuration.
Optics
no code implementations • 20 Jan 2021 • Steffen Hädrich, Marco Kienel, Michael Müller, Arno Klenke, Jan Rothhardt, Robert Klas, Thomas Gottschall, Tino Eidam, András Drozdy, Péter Jójárt, Zoltán Várallyay, Eric Cormier, Károly Osvay, Andreas Tünnermann, Jens Limpert
Here, two-stage nonlinear compression of a 660 W femtosecond fiber laser system is utilized to achieve unprecedented average power levels of energetic ultrashort or even few-cycle laser pulses.
Optics
no code implementations • 14 Jan 2021 • Arno Klenke, Michael Müller, Henning Stark, Marco Kienel, Cesar Jauregui, Andreas Tünnermann, Jens Limpert
However, currently a number of physical effects prevents further power scaling.
Optics
