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1 kW, 10 mJ, 120 fs coherently combined fiber CPA laser system
preprint
posted on 2023-01-11, 22:14 authored by Henning Stark, Joachim Buldt, Michael Müller, Arno Klenke, Jens LimpertAn ultrafast fiber chirped-pulse amplification laser system based on coherent combination of 16 ytterbium-doped rod-type amplifiers is presented. It generates 10 mJ pulse energy at 1 kW average power and 120 fs pulse duration. A partially helium-protected, two-staged chirped-pulse amplification grating compressor is implemented to maintain the close to diffraction-limited beam quality by avoiding nonlinear absorption in air.
