Title :
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
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.926908
