本文用适当的多项式函数近似扩散光波导的高斯折射率分布函数，推导了导模有效折射率的解析形式渐近解。
The Gaussian index profile of a diffused optical waveguide is approximated by an appropriate polynomial, and the asymptotic solutions of the mode efficient index is derived in a analytical form.
给出了公式推导，计算了扩散各向同性及扩散各向异性平面光波导的传播特性，并与其它方法所得结果进行了比较。
By using this method, the characteristics of propagation for diffused planar waveguides are calculated and compared with the finite element method.
建立了扩散平板光波导的等效阶跃平板波导模型，进行了一系列的模拟计算，得出了一系列波导传播参量、结构参量与工艺参量之间的关系曲线。
The model was established, and a set of simulation has been done, and a series of relationship curves among the parameters of wave guide propagation, structure and technics are obtained.
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