Title :
Design considerations for an electrooptic directional coupler modulator
Author :
Anwar, N. ; Themistos, C. ; Rahman, B. M Azizur ; Grattan, Kenneth T V
Author_Institution :
Dept. of Electr. Electron. & Inf. Eng., City Univ., London, UK
fDate :
4/1/1999 12:00:00 AM
Abstract :
A rigorous numerical model is presented for an electrooptic directional coupler (DC) modulator. It was observed that it is possible for such a device to be optimized by the variation of a number of fabrication parameters. The applied field, the induced refractive index changes, and hence the change in the waveguide optical field due to the antisymmetric refractive index change are calculated for an elected structure. Finally, the product of switching voltage and coupling length, the power transfer efficiency, obtained using the least squares boundary residual (LSBR) method, and the optical loss due to the metal electrodes are also given
Keywords :
electro-optical modulation; least squares approximations; optical design techniques; optical directional couplers; optimisation; refractive index; antisymmetric refractive index change; applied field; coupling length; elected structure; electrooptic directional coupler modulator; fabrication parameter optimisation; induced refractive index changes; least squares boundary residual method; metal electrodes; optical design considerations; optical loss; power transfer efficiency; rigorous numerical model; switching voltage; waveguide optical field; Directional couplers; Electrooptic modulators; Numerical models; Optical device fabrication; Optical modulation; Optical refraction; Optical variables control; Optical waveguides; Refractive index; Waveguide transitions;
Journal_Title :
Lightwave Technology, Journal of
