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根据热传导方程,对侧面泵浦复合薄片新结构的热效应进行了分析,求解出侧面泵浦薄片晶体内的温度、应力以及等效热焦距,模拟分析了晶体厚度,边界条件等对晶体热效应的影响。对比分析了同等条件下非复合晶体和复合晶体的温度、应力及热焦距。计算和数值模拟表明:同等条件下复合后晶体中心到边缘的温差、应力和非复合时相比减少了近25%,等效热焦距增大到非复合时的2倍左右,为进一步优化激光器设计,补偿热效应提供了依据,为提高激光输出的稳定性奠定了理论基础。
According to the heat conduction equation, the thermal effect of the new structure of the side pumped composite sheet was analyzed, the temperature, stress and equivalent thermal focal length in the side pumped sheet were calculated, and the influence of crystal thickness and boundary conditions on the thermal effect of the crystal . The temperature, stress and thermal focal length of non-composite crystal and composite crystal under the same conditions were compared and analyzed. Computation and numerical simulation show that: under the same conditions, the temperature difference between the center and the edge of the composite crystal decreases by nearly 25% compared with that of the non-composite crystal, and the equivalent thermal focal length increases to twice that of the non-composite crystal. In order to further optimize the laser Design, compensation for thermal effects provide a basis for the stability of the laser output has laid a theoretical foundation.