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arXiv · 2101.09686

23 mJ high-power fiber CPA system using electro-optically controlled divided-pulse amplification

Henning Stark·Joachim Buldt·Michael Müller·Arno Klenke·Andreas Tünnermann·Jens Limpert
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Abstract

The pulse-energy scaling technique electro-optically controlled divided-pulse amplification is implemented in a high-power ultrafast fiber laser system based on coherent beam combination. A fiber-integrated front end and a multi-pass cell based back end allow for a small footprint and a modular implementation. Bursts of 8 pulses are amplified parallel in up to 12 ytterbium-doped large-pitch fiber amplifiers. Subsequent spatio-temporal coherent combination of the 96 total amplified pulse replicas to a single pulse results in a pulse energy of 23 mJ at an average power of 674 W, compressible to a pulse duration of 235 fs. To the best of our knowledge, this is the highest pulse energy ever accomplished with a fiber CPA system.

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Henning Stark, Joachim Buldt, Michael Müller, Arno Klenke, Andreas Tünnermann, Jens Limpert. 2021-01-24. 23 mJ high-power fiber CPA system using electro-optically controlled divided-pulse amplification. https://doi.org/10.1364/ol.44.005529

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