【摘要】 本文从两种扩散模型出发详细分析了二维扩散光波导中的浓度分布。一是从理论上把Hocker和Burns的结果推广到各向异性介质中,并分析了其近似条件。二是利用Tsonev分析一维扩散时提出的二步扩散假设,解出了适用于二维分布的新的解析解。对于两种模型的解进行了比较,有关结果可用于波导模式、传输特性的分析并供波导制备中确定工艺条件作参考。更多还原

【Abstract】 Two dimensional density profiles in diffused channel optical waveguides are analysed in detail based on two diffusion models. First, it extends the Hocker and Burns’result corresponding to isotropic dielectric media into aniaolropic media and analyses the approximation condition, secondly, it makes use of Tsonev’s two-step diffusion model proposed for one dimensional diffusion analysis and gives a new analytical result of two dimensional diffusion. Comparisons between these two solutions are made while the results could be used to analyse waveguide modes and propagation constants, and to help determining the technological parameters of waveguide fabrication.更多还原