Nonlinear optical mode coupling by ionization in an Ar-filled capillary with high-power short-pulse excitation

This study focuses on the numerical simulation of pulse propagation in a parameter regime dominated by plasma effects and by the nonlinear properties of ionization. Simulation results are then compared with experimental observations. Furthermore, the model gives a prediction of the full radial and longitudinal distribution of the plasma density as well as the temporal dynamics. Hence, this should prove useful to gain a better understanding of the interplay between different linear and nonlinear processes which lead to XUV generation by high harmonic generation.