On‐Chip Multi‐Mode Manipulation via 2D Refractive‐Index Perturbation on a Waveguide
On‐Chip Multi‐Mode Manipulation via 2D Refractive‐Index Perturbation on a Waveguide
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DOI：
10.1002/adom.202000996
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发表时间：
2020-10
影响因子：
9
通讯作者：
Chunhui Yao;Zhen Wang;Hongwei Wang;Yu He;Yong Zhang;Yikai Su
中科院分区：
文献类型：
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作者：
Chunhui Yao;Zhen Wang;Hongwei Wang;Yu He;Yong Zhang;Yikai Su
Generation and manipulation of optical modes are of general interest to the photonics community. Mode conversion is an essential requirement in mode‐division multiplexed systems. In this paper, a scalable method to simultaneously manipulate multiple waveguide modes on chip is proposed. As one experimental demonstration, simultaneous multi‐mode conversion processes have been achieved on a waveguide. The device is realized via an all‐dielectric 2D structure on the silicon waveguide by shallow etching with hexagonal patterns. In the experiment, the device simultaneously converts the TEi modes to the TEi+3 (i = 0, 1, and 2) modes. The length of the multi‐mode converter is 16.2 µm. The TE0–TE3, TE1–TE4, and TE2–TE5 mode conversion processes exhibit low insertion losses (0.4 to 1.0 dB) and reasonable crosstalk values (−14.1 to −16.5 dB) at 1538 nm. The scalability of the converter is also verified by simulations.
