Integrated multimode interference coupler-based mach-zehnder interferometric modulator fabricated on a silicon-on-insulator substrate

Author

Chuang, Ricky W. ; Hsu, Mao-Teng ; Chang, Yao-Chung ; Lee, Young-Joon ; Chou, S.-H.

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

Volume

6

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

147

Lastpage

152

Abstract

The authors propose the design of a 6000×40-μm Mach-Zehnder interferometric (MZI) electro-optic modulator fabricated on silicon-on-insulator (SOI) substrate based on a back-to-back cascade of two 1×2 multimode interference (MMI) couplers for the operating wavelength of 1.55μm. A signal modulation is achieved with the incorporation of a phase shifter in one of the two arms that connect two MMI devices together and the resultant extinction ratio achieved is in the excess of -25dB. Furthermore, the frequency response measurement also shows that the 3-dB frequency measured for our MMI-MZI device is greater than 6 MHz.

Keywords

Mach-Zehnder interferometers; electro-optical modulation; frequency response; interference suppression; optical couplers; optical phase shifters; silicon-on-insulator; MMI; MZI; Mach-Zehnder interferometry; back-to-back cascade; electro-optic modulator; frequency response measurement; multimode interference coupler; phase shifter; signal modulation; silicon-on-insulator substrate; size 40 mum; size 6000 mum; wavelength 1.55 mum;

fLanguage

English

Journal_Title

Optoelectronics, IET

Publisher

iet

ISSN

1751-8768

Type

jour

DOI

10.1049/iet-opt.2010.0106

Filename

6226911