Two dimensional silicon waveguide chirped grating couplers for vertical optical fibers

被引：41

作者：

Chen, Xia ^{[1
]}

Li, Chao ^{[1
]}

Tsang, Hon Ki ^{[1
]}

机构：

[1] Chinese Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2010年 / 283卷 / 10期

关键词：

Integrated optics; Silicon-on-insulator; Coupler; Waveguide grating; BROAD-BAND; COMPACT; EFFICIENT;

D O I：

10.1016/j.optcom.2010.01.059

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Shallow etched two dimensional gratings for coupling light between silicon-on-insulator nanophotonic waveguides and vertical optical fibers were designed and experimentally characterized. We show that the large second order back reflection could be suppressed effectively by applying a linear chirp in the grating period for two dimensional grating couplers. The total coupling efficiency from an optical fiber to two orthogonal silicon waveguides is independent of the input polarization. An almost linear relationship between the average effective index of the grating region and the fill factor for 10 grating is obtained and verified. We also show that the average effective index for the two dimensional grating is similar to the one dimensional grating with the same fill factor in the light propagation direction, when the fill factor of the etched holes was larger than 0.5. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2146 / 2149

页数：4

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