Abstract
Several techniques have been developed for the beam smoothing of high power glass laserfor the inertial confinement fusion research. A principal concept of beam smoothing includesthe random phasing of beam and the speckle suppression. Techniques of coherence control arequite important in order to smooth out the speckle. Techniques reviewed here are the polarizationdistribution across the beam, the introduction of incoherence, the angular dispersion of spectral component, and the frequency modulated light with temporal and spatial color cycles.
