DOI: 10.1364/oe.493326 ISSN: 1094-4087

49 W carrier-envelope-phase-stable few-cycle 2.1 µm OPCPA at 10 kHz

Maximilian F. Seeger, Dominik Kammerer, Johannes Blöchl, Marcel Neuhaus, Vladimir Pervak, Thomas Nubbemeyer, Matthias F. Kling
  • Atomic and Molecular Physics, and Optics

We demonstrate a mid-infrared optical parametric chirped pulse amplifier (OPCPA), delivering 2.1 µm center wavelength pulses with 20 fs duration and 4.9 mJ energy at 10 kHz repetition rate. This self-seeded system is based on a kW-class Yb:YAG thin-disk amplifier driving a CEP stable short-wavelength-infrared (SWIR) generation and three consecutive OPCPA stages. Our SWIR source achieves an average power of 49 W, while still maintaining excellent phase and average power stability with sub-100 mrad carrier-envelope-phase-noise and 0.8% average power fluctuations. These parameters enable the OPCPA setup to drive attosecond pump probe spectroscopy experiments with photon energies in the water window.

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