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Proceedings Paper

Sub-700fs pulses at 152 W average power from a Tm-doped fiber CPA system
Author(s): Christian Gaida; Fabian Stutzki; Martin Gebhardt; Florian Jansen; Andreas Wienke; Uwe D. Zeitner; Frank Fuchs; Cesar Jauregui; Dieter Wandt; Dietmar Kracht; Jens Limpert; Andreas Tünnermann
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Paper Abstract

Thulium-based fiber lasers potentially provide for the demand of high average-power ultrafast laser systems operating at an emission wavelength around 2 μm. In this work we use a Tm-doped photonic-crystal fiber (PCF) with a mode field diameter of 36 μm enabling high peak powers without the onset of detrimental nonlinear effects. For the first time a Tmdoped PCF amplifier allows for a pump-power limited average output power of 241 W with a slope efficiency above 50%, good beam quality and linear polarization. A record compressed average power of 152 W and a pulse peak power of more than 4 MW at sub-700 fs pulse duration are enabled by dielectric gratings with diffraction efficiencies higher than 98% leading to a total compression efficiency of more than 70%. A further increase of pulse peak power towards the GW-level is planned by employing Tm-doped large-pitch fibers with mode field diameters well above 50 μm. The coherent combination of ultrafast pulses might eventually lead to kW-level average power and multi-GW peak power.

Paper Details

Date Published: 4 March 2015
PDF: 6 pages
Proc. SPIE 9344, Fiber Lasers XII: Technology, Systems, and Applications, 93441K (4 March 2015); doi: 10.1117/12.2079056
Show Author Affiliations
Christian Gaida, Friedrich-Schiller-Univ. Jena (Germany)
Fabian Stutzki, Friedrich-Schiller-Univ. Jena (Germany)
Martin Gebhardt, Friedrich-Schiller-Univ. Jena (Germany)
Florian Jansen, TRUMPF Laser GmbH & Co. KG (Germany)
Andreas Wienke, Laser Zentrum Hannover e.V. (Germany)
Uwe D. Zeitner, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Frank Fuchs, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Cesar Jauregui, Friedrich-Schiller-Univ. Jena (Germany)
Dieter Wandt, Laser Zentrum Hannover e.V. (Germany)
Dietmar Kracht, Laser Zentrum Hannover e.V. (Germany)
Jens Limpert, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Helmoltz-Institute Jena (Germany)
Andreas Tünnermann, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Helmoltz-Institute Jena (Germany)


Published in SPIE Proceedings Vol. 9344:
Fiber Lasers XII: Technology, Systems, and Applications
L. Brandon Shaw, Editor(s)

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