Optimum small-scale management of random beam perturbations in a femtosecond laser pulse
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- Kandidov, V., Dormidonov, A., Kosareva, O. et al. Appl. Phys. B (2007) 87: 29. doi:10.1007/s00340-006-2555-9
We have performed statistical simulations of stochastic filament control in a femtosecond laser pulse. Suppression of random multiple filaments is performed by means of a mesh introduced into the transverse beam section at the laser system output. The optimum size of a single square mesh unit contains (3.1-3.2)Pcr for self-focusing in the medium. Controlled filaments are formed in several groups along the laser pulse propagation direction. Almost simultaneous formation of multiple filaments can be attained by means of spatial modulation of the mesh transmission coefficient.