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Multi-phase matching-based compact vertical coupler for 3D mode (de)multiplexing
Journal of Nanophotonics ( IF 1.5 ) Pub Date : 2021-05-01 , DOI: 10.1117/1.jnp.15.026004
Weifeng Jiang 1 , Siqiang Mao 1 , Jinzhu Hu 1
Affiliation  

A compact vertical coupler is proposed and optimized based on the multi-phase matching for three-dimensional (3D) mode (de)multiplexing [(De)MUX]. The multi-phase matching conditions can be achieved for the operating TE2, TE1, and TE0 modes of the subwavelength grating-based waveguide. The coupling strength can be significantly increased due to the subwavelength structure. The proposed 3D mode (De)MUX is optimized by utilizing the 3D full-vectorial finite difference time domain method. The optimized mode (De)MUX can achieve the coupling lengths of only 0.25 and 1.75 μm for demultiplexing TE1 and TE2 modes. The insertion losses of the TE2, TE1, and TE0 modes are only 0.25, 0.27, and 0.13 dB, respectively, and 3-dB bandwidths are calculated to be 364, 203, and >300 nm, respectively.

中文翻译:

基于多相匹配的紧凑型垂直耦合器,用于3D模式(解复用)

提出了一种紧凑的垂直耦合器,并基于多相匹配对三维(3D)模式(解)多路复用[[De] MUX]进行了优化。对于基于亚波长光栅的波导的工作TE2,TE1和TE0模式,可以实现多相匹配条件。由于亚波长结构,可以显着提高耦合强度。所提出的3D模式(De)MUX通过利用3D全矢量有限差分时域方法进行了优化。对于解复用TE1和TE2模式,优化的模式(De)MUX只能实现0.25和1.75μm的耦合长度。TE2,TE1和TE0模式的插入损耗分别仅为0.25、0.27和0.13 dB,而3-dB带宽经计算分别为364、203和> 300 nm。
更新日期:2021-05-26
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