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Propagation of Laser Beams by Decomposition into Gaussian Beamlets

Experiments with high power laser systems (HPLS) such as [1] require a completely characterized focal spot: spatially and temporally. In order to study the laser field distribution on the target, we have developed a method to determine the beam shape after propagating in free-space or after the focusing optics. Our numerical simulations proved to be in good agreement with other propagation approaches, and require reasonable computing resources.