We present post-compression of 22-mJ 90-fs pulses at 3.9 µm via spectral broadening in a noble-gas-filled 1 mm core diameter 3 meter long capillary with over 60% throughput and recompressed in a bulk BaF2 plate down to 33 fs. This method allows the generation of high energy few-cycle pulses in the mid-IR spectral range.

© 2016 Optical Society of America

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