Gaia Barbiero, Yanik Pfaff, Michael Rampp, Haochuan Wang, Sandro Klingebiel, Catherine Y. Teisset, Robert Jung, Abel H. Woldegeorgis, Jonathan Brons, Andreas Maier, Clara Saraceno, Thomas Metzger
We conducted high energy nonlinear broadening experiments based on a gas-filled multipass cell seeded by a Yb-doped thin-disk regenerative amplifier (Dira 1000-5) capable of delivering 200 mJ pulses at a repetition rate of 5 kHz with durations below 500 fs. This setup recently demonstrated the possibility to compress 180 mJ pulses down to 42 fs without affecting the beam quality, while increasing the peak power by a factor of 12. In this work, we further characterize the output in terms of compressibility and beam quality.
We report on multi-100W ultrafast laser sources based on industrialized components which deliver pulse energies starting from sub-mJ to well exceeding 200mJ. These sources are based on ytterbium-doped laser media which intrinsically have very high efficiencies and therefore allow for stable operation at high average powers but are limited due to the supported bandwidth to some 100fs pulse durations. The presented setups compress this type of pulses to well below 50fs with a single SPM-based stage which adds approximately an order of magnitude in pulsed peak power. Adding a second stage allows for even shorter pulses in the few-cycle regime where even the carrier-envelope phase of the pulses is of relevance and consequently has to be characterized and stabilized.
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