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21 February 2020 10.4 kW coherently-combined ultrafast fiber laser
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We present a coherently-combined ultrafast fiber laser system consisting of twelve amplifier channels delivering 10.4 kW average power at 80 MHz repetition rate with a pulse duration of 240 fs FWHM and an almost diffraction-limited beam quality of M2 ≤ 1.2. The system incorporates an automated self-adjustment of the beam combination with 3 degrees of freedom per channel. The system today is, to the best of our knowledge, the world’s most average-powerful femtosecond laser. Thermographic analysis indicates that power scaling to 100 kW-class average power is feasible.
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M. Mueller, C. Aleshire, H. Stark, J. Buldt, A. Steinkopff, A. Klenke, A. Tünnermann, and J. Limpert "10.4 kW coherently-combined ultrafast fiber laser", Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 112600B (21 February 2020);


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