Read the latest paper by J. Ahrens et al. on Multipass OPCPA system at 100 kHz pumped by CPA-free solid-state amplifier
Abstract: ‘We present a compact few-cycle 100 kHz OPCPA system pumped by a CPA-free picosecond Nd:YVO4 solid-state amplifier with all-optical synchronisation to an ultra-broadband Ti:Sapphire oscillator. This pump approach shows an exceptional conversion rate into the second harmonic of almost 78%. Efficient parametric amplification was realised by a two stage double-pass scheme with following chirped mirror compressor. The amount of superfluorescence was measured by an optical cross-correlation. Pulses with a duration of 8.7 fs at energies of 18 µJ are demonstrated. Due to the peak power of 1.26 GW, this simple OPCPA approach forms an ideal high repetition rate driving source for high-order harmonic generation.’
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Reference: J. Ahrens, O. Prochnow, T. Binhammer, T. Lang, B. Schulz, M. Frede, and U. Morgner, “Multipass OPCPA system at 100 kHz pumped by a CPA-free solid-state amplifier,” Opt. Express 24, 8074-8080 (2016)