Theoretical Investigation of Polarization-Insensitive Multimode Interference Splitters on Silicon-on-Insulator

Author

Lin, Jie

Author_Institution

Electr. Eng. Dept., Bucknell Univ., Lewisburg, PA

Volume

20

Issue

14

fYear

2008

fDate

7/15/2008 12:00:00 AM

Firstpage

1234

Lastpage

1236

Abstract

An ultracompact polarization-insensitive 1times2 multimode interference (MMI) splitter based on silicon-on-insulator is investigated theoretically. The impact of the insulator index on the size of the MMI and the polarization-dependent performance is analyzed. A polarization-insensitive 1times2 MMI splitter of 4 mum by 16.5 mum is shown as an example. Relaxed tolerances on MMI width (> plusmn100 nm) and length (> plusmn0.7 mum) are obtained for both polarizations while the polarization differential loss is kept in range of 0.1 dB and its excess loss is kept below 0.5 dB. In addition, a wide operation wavelength window of 150 nm is obtained for both polarizations as well.

Keywords

optical beam splitters; polarisation; silicon-on-insulator; insulator index; multimode interference splitters; polarization differential loss; polarization-insensitive splitters; silicon-on-insulator; Insulation; Interference; Optical devices; Optical filters; Optical losses; Optical polarization; Optical waveguides; Performance analysis; Photonic integrated circuits; Silicon on insulator technology; Multimode interference (MMI); polarization-insensitive; silicon (Si) wire waveguide; silicon-on-insulator (SOI); tolerance;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.926005

Filename

4547914