Directional couplers made of nonidentical asymmetric slabs. Part II: Grating-assisted couplers
Directional couplers made of nonidentical asymmetric slabs. Part II: Grating-assisted couplers
复制标题
DOI：
10.1109/jlt.1987.1075493
复制
发表时间：
1987-02
影响因子：
4.7
通讯作者：
D. Marcuse
中科院分区：
文献类型：
--
作者：
D. Marcuse
本文的第二部分讨论了由非同步、非全同非对称平板波导制成的TE和TM模定向耦合器。耦合是在衍射光栅的帮助下完成的，衍射光栅放置在两个波导中的任何一个上，面向相对的平板。光栅将完整板结构的复合模式彼此耦合。然而，由于两个板是不同步的，复合模式非常类似于孤立的每个板的模式。我们还提供了近似的表达式，结果从近似的复合模式与模式的个别板。通过与精确结果的比较，估计了这些近似的精度。
In this second part of the paper we discuss TE and TM mode directional couplers made of nonsynchronous, nonidentical asymmetric slab waveguides. Coupling is accomplished with the help of a diffraction grating that is placed on either of the two guides on the side facing the opposite slab. The grating couples the compound modes of the complete slab structure to each other. However, since the two slabs are nonsynchronous, the compound modes resemble closely the modes of each slab in isolation. We also provide approximate expressions that result from approximating the compound modes with the modes of the individual slabs. The accuracy of these approximations is estimated by comparison with the exact results.