Horizontal directional coupler formed with waveguides of different heights for mode-division multiplexing
Horizontal directional coupler formed with waveguides of different heights for mode-division multiplexing
复制标题
不同高度波导形成的水平定向耦合器用于模分复用
DOI：
10.1109/jphot.2017.2731046
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发表时间：
2017
影响因子：
2.4
通讯作者：
Kin Seng Chiang
中科院分区：
文献类型：
--
作者：
Wei Ke Zhao;Kai Xin Chen;Jie Yun Wu;Kin Seng Chiang
我们提出了一种由两个不同高度的平行波导形成的水平定向耦合器。通过破坏水平和垂直方向上的对称性，该定向耦合器可以被设计为允许在少模波导的任何两个空间模式之间耦合，而不管它们的对称性，而由相等高度的平面波导形成的常规定向耦合器仅允许在垂直方向上相同对称性的两个空间模式之间耦合。作为一个例子，我们设计和制作这样的定向耦合器与聚合物材料的（解）复用的LP 01和LP 11b模式，这在垂直方向上具有对称和反对称的场分布，分别。我们典型的制造设备显示出耦合比高于95%的波长范围从1530至1560 nm。LP 01和LP 11b模式的插入损耗分别为9.6和12.8 dB。该器件的性能对温度变化不敏感。所提出的定向耦合器易于制造，并且可以用作实现用于模分复用应用的模式控制器件的基本结构。
We propose a horizontal directional coupler formed with two parallel waveguides of different heights. By breaking the symmetry in both the horizontal and the vertical direction, this directional coupler can be designed to allow us coupling between any two spatial modes of a few-mode waveguide, regardless of their symmetry properties, whereas a conventional directional coupler formed with planar waveguides of equal heights only allows us coupling between two spatial modes of the same symmetry in the vertical direction. As an example, we design and fabricate such a directional coupler with polymer material for the (de)multiplexing of the LP01 and the LP11b mode, which have a symmetric and an antisymmetric field distribution in the vertical direction, respectively. Our typical fabricated device shows a coupling ratio higher than 95% in the wavelength range from 1530 to 1560 nm. The insertion losses for the LP01 and LP11b modes are 9.6 and 12.8 dB, respectively. The performance of the device is weakly sensitive to temperature variations. The proposed directional coupler is easy to fabricate and can be used as a basic structure for the implementation of mode-controlling devices for mode-division-multiplexing applications.