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Design of Three-Dimensional Optical Waveguides Consisting of Composite Materials for Optical Integrated Circuits

光集成电路用复合材料三维光波导设计

基本信息

批准号：
60550270
负责人：
KOSHIBA Masanori
金额：
$ 1.34万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550270/
关键词：
Optical Integrated Circuit Optical Waveguide Optical Fiber Diode Laser Dielectric Waveguide Finite-Element Method Numerical Analysis 電磁界理論

项目摘要

The purpose of this project is to develop an optimum design system of three-dimensional optical waveguides consisting of composite materials for optical integrated circuits. This system is based on the finite-element method which enables one to compute accurately the mode spectrum of a waveguide composed of inhomogeneous, anisotropic, active, and lossy media.The most serious difficulty in using the finite-element analysis, for inhomogeneous dielectric waveguides, is the appearance of the so-called spurious, nonphysical solutions. To overcome this difficulty, two improved approaches were developed in this project. One is the penalty function method and the other is the method using the transverse magnetic-field component. In the former approach, the divergence-free constraint for the magnetic-field vector is satisfied in the least-square sense and the spurious solutions can be supressed from the guided- or slow-wave region. In the latter approach, the divergence relation is implicitly satisfied and the spurious solutions are completely eliminated in the whole region of a propagation diagram.These new approaches were applied for various optical waveguides. First, stress-applied polarization-maintaining optical fiber and side-tunnel type polarization-maintaining optical fiber were analysed and the modal birefringence characteristics were estimated. Next, anisotropic dielectric waveguides and gyrotropic waveguides were analysed and the dispersion characteristics were investigated. Lastly, buried heterostructure diode lasers were analysed and the modal gain characteristics were evaluated.

本课题旨在开发一种用于光学集成电路的复合材料三维光波导优化设计系统。该系统基于有限元方法，可以精确计算由非均匀、各向异性、有源和有耗介质组成的波导的模式谱。对非均匀介质波导进行有限元分析时，最严重的困难是所谓的虚假非物理解的出现。为了克服这一困难，本项目开发了两种改进的方法。一种是罚函数法，另一种是利用横向磁场分量法。在前一种方法中，磁场矢量在最小二乘意义上满足无散度约束，并且可以抑制导波或慢波区域的杂散解。后一种方法可以隐式地满足散度关系，并在传播图的整个区域内完全消除假解。这些新方法已应用于各种光波导。首先，对应力型保偏光纤和侧隧道型保偏光纤进行了分析，并对其模态双折射特性进行了估计。其次，分析了各向异性介质波导和陀螺波导，并研究了色散特性。最后，对埋藏异质结构二极管激光器进行了分析，并对其模态增益特性进行了评价。