Subwavelength TE/TM grating coupler based on silicon-on-insulator

被引：12
作者：
Zhang, Jingjing [1 ]
Yang, Junbo [1 ,2 ]
Lu, Huanyu [1 ,3 ]
Wu, Wenjun [1 ]
Huang, Jie [1 ]
Chang, Shengli [1 ]
机构：
[1] Natl Univ Def Technol, Ctr Mat Sci, Changsha 410073, Hunan, Peoples R China
[2] Peking Univ, State Key Lab Adv Opt Commun Syst & Networks, Beijing 100871, Peoples R China
[3] Univ Elect Sci & Technol China, Chengdu 610054, Peoples R China
来源：
INFRARED PHYSICS & TECHNOLOGY | 2015年 / 71卷
基金：
中国国家自然科学基金;
关键词：
Integrated optics; Gratings; Subwavelength structures;
D O I：
10.1016/j.infrared.2015.06.018
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
In this letter, we report a novel uniform grating coupler, which can couple the light of different polarization from fiber into a single waveguide at same wavelength range. When incident wavelength is 1550 nm, for TE mode, the coupling efficiency can achieve more than 50% with similar to 30 nm 1 dB bandwidth. For TM mode, the coupling efficiency can also obtain more than 50% and 35 nm 1 dB bandwidth. Their corresponding wavelength difference between two polarizations' coupling peaks is demonstrated to be less than 5 nm reported in this letter. Many limits of application about influence of polarization-depend can be solved by this design. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：542 / 546
页数：5
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