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Effects of nonlinear refractive index on few-cycle PW-class OPCPA

With an increasing number of large-scale petawatt class lasers being based on Optical Parametric Chirped Pulse Amplification (OPCPA) simulations of the nonlinear amplification process and its parasitics becomes an important factor. OPCPA seems ideal to amplify broad bandwidth pulses to joule-level energies, making feasible the generation of few-cycle pulses with petawatt (PW) peak powers, but pushing such limits requires accurate modeling; i.e. parasitic nonlinear processes which can adversely affect OPCPA need to be considered.