Sub-700fs pulses at 152 W average power from a Tm-doped fiber CPA system

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

doi:10.1117/12.2079056

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4 March 2015 Sub-700fs pulses at 152 W average power from a Tm-doped fiber CPA system

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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Proceedings Volume 9344, Fiber Lasers XII: Technology, Systems, and Applications; 93441K (2015) https://doi.org/10.1117/12.2079056
Event: SPIE LASE, 2015, San Francisco, California, United States

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.

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Christian Gaida, Fabian Stutzki, Martin Gebhardt, Florian Jansen, Andreas Wienke, Uwe D. Zeitner, Frank Fuchs, Cesar Jauregui, Dieter Wandt, Dietmar Kracht, Jens Limpert, and Andreas Tünnermann "Sub-700fs pulses at 152 W average power from a Tm-doped fiber CPA system", Proc. SPIE 9344, Fiber Lasers XII: Technology, Systems, and Applications, 93441K (4 March 2015); https://doi.org/10.1117/12.2079056

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