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分别用精确计算和方均根近似方法得到了包层及衬底均为非线性Ｋｅｒｒ型介质、芯区为多量子阱的对称平板波导中ＴＥ模的传播特性。数值计算表明，当芯区多量子阱的层数较多时，方均根近似方法得到的结果与用精确方法得到的结果一致，此时多量子阱波导可以等效为均匀介质。对于自聚焦情况，在合适的光功率下，当分界面处包层（及衬底）的有效折射率与芯区折射率相等时，芯区的场分布呈均匀分布而两侧的场呈指数式衰减；功率继续增大时，场分布的极值进入芯区两侧，而芯区场分布呈下凹形。对于自散焦情况，波导对导波场有较强干线性波导的束缚作用，且随光功率的增大而增强。
The propagation characteristics of TE mode in a symmetric slab waveguide with cladding and substrate are both nonlinear Kerr-type cladding and core-multiple quantum wells are obtained by exact calculation and RMSE respectively. Numerical calculations show that when the number of MQW layers in the core is large, the results obtained by the RMSE method are consistent with the results obtained by the accurate method. In this case, the MQW waveguide can be equivalent to a homogeneous medium. For the self-focusing case, when the effective refractive index of the cladding (and the substrate) at the interface is equal to the refractive index of the core at a suitable optical power, the field distribution in the core is uniformly distributed and the fields on both sides are exponential Attenuation; When the power continues to increase, the extreme value of the field distribution enters both sides of the core area, while the core field distribution is concave. For self-defocusing, the waveguide has a stronger interfering effect on the guided waveguides and increases with the increase of optical power.