Transmission Line Characterization of Undercut-Ridge Traveling-Wave Electroabsorption Modulators

Author

Dummer, Matthew M. ; Klamkin, Jonathan ; Norberg, Erik J. ; Tauke-Pedretti, Anna ; Raring, James W. ; Coldren, Larry A.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of California Santa Barbara, Santa Barbara, CA

Volume

20

Issue

15

fYear

2008

Firstpage

1302

Lastpage

1304

Abstract

An experimental analysis of the electrical properties of traveling-wave electroabsorption modulators with undercut waveguides is presented. Modulators of varying ridge widths and amounts of undercut are fabricated and tested to compare characteristic impedance, effective index, microwave loss, and optical bandwidth. We demonstrate effective velocity matching and >40-GHz 3-dB bandwidth for a 400-mum-long device.

Keywords

electro-optical modulation; electroabsorption; microwave photonics; optical losses; optical waveguides; refractive index; transmission lines; characteristic impedance; effective index; microwave loss; optical bandwidth; transmission line characterization; traveling-wave electroabsorption modulators; undercut waveguides; velocity matching; Bandwidth; Capacitance; Electrodes; Etching; Impedance; Optical modulation; Optical scattering; Optical transmitters; Optical waveguides; Transmission lines; Electroabsorption; traveling-wave devices; undercut etching;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.926908

Filename

4563480