Title :
Capacitively-loaded travelling-wave electrodes for electro-optic modulators
Author :
Jaeger, Nicolas A F ; Rahmatian, Farnoosh ; Kato, Hiroshi ; James, Robert ; Berolo, Ezio
Author_Institution :
Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC, Canada
Abstract :
Capacitively-loaded, travelling-wave, coplanar strip electrodes were fabricated on a semi-insulating GaAs substrate. Microwave index and attenuation measurements were performed on them at frequencies up to 40 GHz. Such electrodes are intended for use in integrated-optic Mach-Zehnder type electro-optic modulators fabricated using compound semiconductors. They are, in fact, intended to achieve the necessary microwave/lightwave velocity-match condition for graded index AlGaAs or InGaAsP waveguides fabricated on GaAs or InP substrates. We report microwave indices close to 3.2 and losses as small as 2 dB/cm, measured at 40 GHz, for the structures studied here
Keywords :
Mach-Zehnder interferometers; coplanar waveguides; electro-optical modulation; electrodes; electromagnetic wave absorption; gradient index optics; integrated optics; microwave measurement; optical planar waveguides; 40 GHz; AlGaAs; AlGaAs waveguides; GaAs; InGaAsP; InGaAsP waveguides; InP; InP substrate; attenuation measurements; capacitively-loaded travelling-wave electrodes; coplanar strip electrodes; electro-optic modulators; graded index waveguides; integrated-optic Mach-Zehnder type electro-optic modulators; losses; microwave index; microwave indices; microwave/lightwave velocity-match condition; semi-insulating GaAs substrate; Attenuation measurement; Electrodes; Electrooptic modulators; Frequency; Gallium arsenide; Indium phosphide; Performance evaluation; Semiconductor waveguides; Strips; Substrates;
Conference_Titel :
Electrical and Computer Engineering, 1995. Canadian Conference on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2766-7
DOI :
10.1109/CCECE.1995.526638
