Generalized modelling for the design of guided-wave optical directional couplers.
Generalized modelling for the design of guided-wave optical directional couplers.
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DOI：
10.1364/ol.39.001161
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发表时间：
2014-03
期刊：
影响因子：
3.6
通讯作者：
B. Troia;F. De Leonardis;V. Passaro
中科院分区：
文献类型：
--
作者：
B. Troia;F. De Leonardis;V. Passaro
在这封信中，我们提出了一种基于耦合模式理论和超模式理论的严格且通用的集成光学弯曲定向耦合器（DC）设计方法。全矢量有限元方法用于计算传播到构成DC的波导中的光学模式的有效指数。这种通用建模方法的灵活性和鲁棒性通过模拟几种定向耦合配置（如基于余弦 S 弯曲和双弧弯曲波导的配置）来证明。此外，通过与三维半矢量光束传播方法的比较，一些数值结果得到了验证。
In this Letter we propose a rigorous and generalized approach for the design of integrated optical bent directional couplers (DCs) based on the coupled mode theory and super mode theory. The full vectorial finite-element method is used for the calculation of effective indices of optical modes propagating into the waveguides constituting the DCs. The flexibility and robustness of this general modelling approach is demonstrated by simulating several directional coupling configurations, as those based on cosine S-bend and double arc bent waveguides. Furthermore, some numerical results have been validated by comparison with the three-dimensional semi-vectorial beam propagation method.