Simulation and measurement of scattering laser energy distribution in extinctive chambers

To simulate the scattering laser energy distribution of 1.06μm pulsed laser reflected multiple times by the inner wall of an extinctive chamber,after analyzing the laser scattering characteristics,a neural network superposition algorithm was put forward and the mathematical model for energy distribution was created.The laser energy distribution pattern under was simulated with 1J 1.06μm laser incident in the chamber.In some reflection area,the reflectance was high with maximal energy of 3.5×10-4J.Actual measurement and theoretical calculation were carried out respectively.Theoretical and measurement results were compared,the maximal and minimum relative error of actual and theoretical value was 10.7% and 1.3%,and both were in the consistent changing rule.All the results show the precision of model can meet the practical requirements of infield simulation tests.