Broadband Ytterbium fiber CPA-system delivering 120fs, 10 mJ pulses at 1 kW average power

High-power, ultrafast fiber lasers drive a variety of applications in industry and science and the demand for more powerful sources is unabated. Existing performance scaling technologies like chirped-pulse-amplification need to be further improved, driven towards their limits to enable ever growing output performance. In this contribution we present on an ytterbium-fiber chirped-pulse-amplification (Yb:FCPA) system based on coherent combination [1] , [2] of 16 parallel rod-type fiber amplifiers delivering 1 kW average power, 10 mJ pulse energy and 120 fs pulse duration. Multi-stage spectral filtering is applied to maximize the bandwidth.