Design of a Highly Efficient Uniform Grating Coupler with Gradually Etched Grooves for Silicon-on-Insulator Waveguides

Author

Chen, Huai-Yi ; Xu, Shao-Yu ; Yang, Kai-Chun

Author_Institution

Dept. of Electron. Eng., Huafan Univ., Taipei, Taiwan

fYear

2012

fDate

21-23 May 2012

Firstpage

1

Lastpage

4

Abstract

A high efficiency "uniform" grating coupler with gradually etched grooves was designed on a silicon-on-insulator substrate without experimental demonstration. For TE polarized coupling of an optical fiber at the wavelength of 1.55 μm, the fiber coupling efficiency of our grating coupler is 81%, output coupling angle is 8 degrees and 1dB spectral bandwidth is 80 nm. This performance is superior to the traditional uniform grating coupler without gradually etched grooves. Besides, our high efficiency broadband grating coupler is much easier to design than the already proposed "non-uniform" grating coupler fabricated using the lag effect of dry etching.

Keywords

etching; optical fibre couplers; optical fibre polarisation; optical waveguides; silicon-on-insulator; Si; TE polarized coupling; dry etching; efficiency 81 percent; gradually etched grooves; lag effect; optical fiber; silicon-on-insulator substrate; silicon-on-insulator waveguides; uniform grating coupler; wavelength 1.55 mum; Couplers; Couplings; Fiber gratings; Gratings; Optical fiber couplers;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics and Optoelectronics (SOPO), 2012 Symposium on

Conference_Location

Shanghai

ISSN

2156-8464

Print_ISBN

978-1-4577-0909-8

Type

conf

DOI

10.1109/SOPO.2012.6271056

Filename

6271056