When laser work continuously, laser and external environment will cause damage to the laser window. The paper analysis the working environment of the equipment and the main factors that cause the window damage. Emulate mirror deformation of the laser emission window under the coupling of force and heat, fit the shape change law of different material windows in force thermal coupling by MATLAB. The results show that high energy laser will have a serious influence on the surface microstructure of windows, splicing window can greatly reduce the influence of window deformation on laser emission, ZnSe' characteristic of materials is best suited for producing wide band iraser emission windows.
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