Nonlinear pulse compression to 22 fs at 15.6 μJ by an all-solid-state multipass approach

We demonstrate nonlinear compression of pulses at 1.03 mu m and repetition rate of 200 kHz generated by a ytterbium fiber laser using two cascaded all-solid-state multipass cells. The pulse duration has been compressed from 460 to 22 fs, corresponding to a compression factor of similar to 21. The compressed pulse energy is 15.6 mu J, corresponding to an average power of 3.1 W, and the overall transmission of the two compression stages is 76%. The output beam quality factor is M-2 similar to 1.2 and the excess intensity noise introduced by nonlinear broadening is below 0.05%. These results show that nonlinear pulse compression down to ultrashort durations can be achieved with an all-solid-state approach, at pulse energies much higher than previously reported, while preserving the spatial characteristics of the laser. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement