Transient regime and correction with adaptive optics of thermal blooming

A numerical model is developed which simulates a high-energy continuous laser beam propagation in a non-turbulent absorbing medium with transverse wind while showing the formation of the thermal blooming process and its evolution with time. Adaptive optics are introduced in the emission plane by means of a time varying phase term which represents either classical optical modes or a continuous deformable surface. Thermal blooming deformation is corrected in the system by searching for the emission phase which maximizes the axis intensity at the target plane. The servo mechanism is used to correct the beam deflection using either an incremental process or a modulation method. The simulation results show the relative importance of each mode in the correcting process and the negative or positive effects of the rapidity of action for each process. This model also can be used to study the effect of a delay introduced before the action of the system.