Fraunhofer diffraction of laser beams with amplitude modulations and phase fluctuations by a lens with a central obscure aperture

Abstract

By using the statistical-optics model and generalized Huygens-Fresnel diffraction integral, Fraunhofer diffraction of high-power laser beams with amplitude modulations (AMs) and phase fluctuations (PFs) focused by a lens with a central obscure aperture has been studied. Detailed numerical calculation results have been given, showing the dependence of the intensity distribution at the geometrical focal position and the power (energy) focus-ability of high-power laser beams not only on the obscure ratio, but also on the truncation parameter, AMs and PFs of beams.