Highly stable, 15 W, few-cycle, 65 mrad CEP-noise mid-IR OPCPA for statistical physics.

We demonstrate a 100 kHz optical parametric chirped-pulse amplifier delivering under 4-cycle (38 fs) pulses at similar to 3.2 mu m with an average power of 15.2 W with a pulse-to-pulse energy stability < 0.7% rms and a single-shot CEP noise of 65 mrad RMS over 8h. This source is continuously monitored, by using a fast 100 kHz data acquisition device, and presents an extreme stability, in the short and long terms. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement