We demonstrate pulse compressibility from 840 fs to 38 fs of 10 mJ pulses from a thin-disk amplifier at a repetition rate of 3 kHz after nonlinear broadening in a multipass cell. In addition, the temporal-intensity contrast is enhanced via nonlinear ellipse rotation of more than a factor 50 with an optical efficiency of 56%. We believe this is the first published experimental combination of multipass cell-based nonlinear compression and nonlinear ellipse rotation-based contrast enhancement preserving both pulse compressibility and beam quality.
A thin-disk based CPA system with a maximum compressed pulse energy of 260 mJ at a repetition rate of 1 kHz and output powers close to 2 kW at 20 kHz is presented. Spectral amplitude shaping led to pulse durations of < 500 fs at 206 mJ.
We demonstrate a thin-disk based regenerative amplifier system with a
maximum pulse energy before compression of 550 mJ at a repetition rate
of 1 kHz. A fraction of the output was recompressed to 602 fs.
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