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Relativistic few-cycle pulses with high contrast from picosecond-pumped OPCPA
For experiments in plasma, nuclear, and high-energy physics, there is a strong demand for laser pulses exhibiting relativistic intensity, few-cycle pulse duration, and a very high contrast. Here we present a picosecond-pumped optical parametric chirped pulse amplification (OPCPA) system delivering pulses at 10 Hz repetition rate with the following key parameters: a compressed pulse duration of less than 7 fs (close to the Fourier limit), a contrast of better than 10 11 starting from 1 ps beforedoi:10.1364/optica.5.000434 fatcat:oekxq64q4jh4bmfla2jbjsljei