Highly efficient and perfectly vertical chip-to-fiber dual-layer grating coupler

被引：64

作者：

Dai, Ming ^{[1
]}

Ma, Leilei ^{[1
]}

Xu, Yelong ^{[1
]}

Lu, Minghui ^{[1
]}

Liu, Xiaoping ^{[1
]}

Chen, Yanfeng ^{[1
]}

机构：

[1] Nanjing Univ, Coll Engn & Appl Sci, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 02期

基金：

美国国家科学基金会;

关键词：

WAVE-GUIDE; SILICON; COMPACT;

D O I：

10.1364/OE.23.001691

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel high-efficiency silicon-chip-to-fiber grating coupler is investigated here. By introducing a dual layer grating structure with an inter-layer lateral shift to mimic 45 degrees tilted mirror behavior, perfectly vertical coupling is successfully demonstrated. Our numerical results show that a peak silicon-chip-to-fiber coupling efficiency about 70% is possible near 1550 nm. Meanwhile, for the entire telecom C-band, i.e. wavelengths from 1530 nm to 1565 nm, the coupling efficiency is > 50% and the back reflection is less than < 1%. Our proposed high-performance silicon perfectly vertical coupling structure is suitable for interfacing with multicore fiber platform, which may play an important role in the future CMOS photonic integration technology. (C) 2015 Optical Society of America

引用

页码：1691 / 1698

页数：8

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