Finite Element Analysis of the Mirror in High-energy Density Laser Resonator

Through the Finite element Analysis (FEA) on the resonator mirror, which absorbs the heat at the front and back surfaces during the operation of high-energy density laser, the thermal displacement distributions are presented under different heat flux and constraint conditions. It is indicated that improving the reflective rate, adopting new mirror substrate material and optimizing the constraint condition of the mirror is an effective method for reducing mirror thermal deformation.