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Opt Express. 2012 Nov 19;20(24):26888-94. doi: 10.1364/OE.20.026888.

75 MW few-cycle mid-infrared pulses from a collinear apodized APPLN-based OPCPA.

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Department of Physics, Institute of Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland.


We present an ultra-broadband optical parametric chirped-pulse amplification (OPCPA) system operating at 3.4 µm center wavelength with a peak power of 75 MW. The OPCPA system is split into a pre- and a power-amplifier stage. Both stages are based on apodized aperiodically poled MgO:LiNbO3 (APPLN). The collinear mixing configuration allows us to manipulate the spectral phase of the output mid-infrared pulses by sending the near-infrared seed pulses through a pulse shaper. The system delivers clean 75-fs pulses with record-high 700 mW average power, corresponding to 7 µJ of pulse energy at a repetition rate of 100 kHz.

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