Title :
A design study of a Ti:LiNbO3 traveling-wave electrooptic modulator by the finite element method
Author :
Franco, Marcos A R ; Passaro, Angelo ; Abe, Nancy M. ; Machad, José M. ; Cardoso, José R.
Author_Institution :
Div. of Appl. Phys., Centro Tecnico Aeroespacial, Brazil
Abstract :
This work presents the analysis and design of electrooptic modulators by the finite element method. The propagation characteristics of Ex modes (effective index, optical field profiles and spot size) in Ti:LiNbO3 waveguides as a function of manufacturing parameters and the quasi-TEM wave characteristics (effective dielectric constant and characteristic impedance) for the coplanar waveguide are computed and shown. Two x-cut Mach-Zehnder-like modulators are analyzed and compared. The first one presents a conventional electrode configuration and the second one is a modified configuration which includes a set of floating electrodes
Keywords :
Mach-Zehnder interferometers; coplanar waveguides; electro-optical modulation; finite element analysis; integrated optics; lithium compounds; permittivity; LiNbO3:Ti; characteristic impedance; coplanar waveguide; effective dielectric constant; effective index; electrode configuration; finite element method; floating electrodes; manufacturing parameters; optical field profiles; propagation characteristics; quasi-TEM wave characteristics; spot size; traveling-wave electrooptic modulator; x-cut Mach-Zehnder-like modulators; Coplanar waveguides; Dielectric constant; Electrodes; Electrooptic modulators; Finite element methods; Impedance; Manufacturing; Optical modulation; Optical propagation; Optical waveguides;
Conference_Titel :
Microwave and Optoelectronics Conference, 1999. SBMO/IEEE MTT-S, APS and LEOS - IMOC '99. International
Conference_Location :
Rio de Janeiro
Print_ISBN :
0-7803-5807-4
DOI :
10.1109/IMOC.1999.867080
