Low-Loss Multimode-Interference-Based Crossings for Silicon Wire Waveguides

Author

Chen, Hui ; Poon, Andrew W.

Author_Institution

Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon

Volume

18

Issue

21

fYear

2006

Firstpage

2260

Lastpage

2262

Abstract

We report multimode-interference (MMI)-based crossings in high-index-contrast silicon wire waveguides. Our experiments show an MMI crossing of ~0.4-dB insertion loss, which suggests ~0.9-dB improvement from a control plain crossing of the same size and refractive index contrast. We also experimentally observe significant crosstalk suppression in our MMI crossing. The MMI crossing transmission exhibits wavelength dependence of less than 0.2 dB within the 1520-1580-nm wavelength range

Keywords

elemental semiconductors; light interference; optical crosstalk; optical losses; optical waveguides; refractive index; silicon; 1520 to 1580 nm; Si; crosstalk suppression; insertion loss; multimode interference crossing; refractive index contrast; silicon wire waveguides; Crosstalk; Insertion loss; Optical arrays; Optical resonators; Optical waveguides; Photonics; Silicon; Solid modeling; Waveguide components; Wire; Cross-grid array; crossings; high-index contrast; integrated optic devices; multimode interference (MMI); silicon wire waveguides;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2006.884726

Filename

1715394