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.
给出了利用渐近解公式，由模有效折射率的测量值确定波导表面折射率和扩散深度的方法。
A method is given for determining the parameters of a diffused waveguide from the observable values of mode efficient index by using the asymptotic solution equations.
本文引入一种研究扩散光波导传播特性及设计计算的新方法——等效阶跃平板波导方法。
The equivalent step planar wave guide method is proposed to study the propagation properties and design of diffused planar wave guide.
这些曲线对于扩散平板光波导的设计计算、工艺参量选择等具有重要指导意义。
These curves are helpful to diffused planar wave guide design and technical parameter selection.
光波导调制器是在自制的钛扩散铌酸埋平面光波导上蒸镀铝电极制成的。
The waveguide modulator is made by depositing Aluminium as electrodes on the Ti-diffused LiNbO3 planar optical waveguide which is fabricated by ourselves.
借助于m线技术测量了有效折射率，并利用逆wkb法计算了波导的折射率分布、扩散深度和扩散系数，发现其扩散性质差异。
Effective refractive indices were measured by m-line technique. The refractive indices distribution, diffusive depth and diffusivity coefficients have been calculated using inverse WKB method.
借助于m线技术测量了有效折射率，并利用逆wkb法计算了波导的折射率分布、扩散深度和扩散系数，发现其扩散性质差异。
Effective refractive indices were measured by m-line technique. The refractive indices distribution, diffusive depth and diffusivity coefficients have been calculated using inverse WKB method.
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