An analysis of periodic waveguides by coupled-mode theory and finite element method
An analysis of periodic waveguides by coupled-mode theory and finite element method
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耦合模理论和有限元法分析周期性波导
DOI：
10.1002/ecjb.4420780310
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
K. Hirayama
中科院分区：
文献类型：
--
作者：
Y. Ohkawa;M. Koshiba;K. Hirayama
作为一种简单的方法来评估的反射和传输特性的光栅波导，提出并制定了一个分析程序，这是耦合模理论和有限元法相结合。有限元法用于确定耦合模方程中的耦合系数。因此，本方法能够分析具有任意形状的光栅波导。此外，非传播模式的能量存储效果自动包括在内。具体地说，折射率调制型光栅反射器进行了分析，从而证实了该方法的有效性。此外，本方法被应用到设计的沟槽光栅反射器，使它的有用性被证明。
As a simple method for evaluating the reflection and transmission characteristics of a grating waveguide, an analysis procedure is proposed and formulated that is a combination of the coupled-mode theory and the finite-element method. The finite-element method is used for the determination of the coupling coefficients in the coupled-mode equations. Therefore, the present method is capable of analyzing a grating waveguide with an arbitrary shape. In addition, the energy storage effect of the nonpropagating modes is automatically included. Specifically, an index-modulation type grating reflector is analyzed so that the validity of the method is confirmed. Also, the present method is applied to the design of a grooved grating reflector so that its usefulness is demonstrated.