Suppression of the thermal effect within a beam control system in the presence of wind

An annular square intensity distribution with linear non-uniformity in the x direction is used to model the high-power laser, a detailed numerical simulation is performed to study the high-power laser propagation in a beam control system by means of a four-dimensional simulation code. It is shown that the thermal effect decreases the peak intensity and beam focusability in the far field. The non-uniformity of the initial beam results in a further decrease of the peak intensity and beam focusability, leads to a shift of the center of beam gravity and peak intensity, and astigmatism in the far field. The transversal wind and axial wind both suppress the thermal effect. The axial wind does not cause a shift of the center of beam gravity and astigmatism in the far field, but it takes a longer