Effect of smoothing by spectral dispersion on performance of diffractive optical element for beam smoothing

In this paper, the effect of smoothing by spectral dispersion (SSD) on the performance of the diffractive optical element (DOE) for beam smoothing is studied. Using SSD technique, the tolerances of the DOE for beam smoothing to wavefront distortion and fabricating error are increased, the high frequency modulation in the intensity distribution is reduced and the performance of beam smoothing is improved. Using SSD and DOE may be consistent with the rigorous demand for beam smoothing in inertial confinement fusion (ICF).