The results of experimental determination of multimode strip waveguide refractive index profiles and \mathrm{Ag} concentration profiles obtained by using the variable wavefront shear double-refracting interferometry microinterferometer Biolar PI and an electron microprobe are presented. The strip waveguides under investigation are formed in soda lime glass in an external electric-field-assisted {\mathrm{Ag}}^{+}{\mathrm{–Na}}^{+} ion-exchange process from the molten {\mathrm{AgNO}}_3 salt by use of dielectric masks with channel apertures. A dry electrochemical technique of dielectric mask formation is applied. The influence of waveguide-forming parameters on the shape of \mathrm{Ag} concentration profiles and the range of silver diffusion are shown. Changes in the usually assumed boundary conditions of electric-field calculations in ion-exchange numerical modeling are suggested.

© 2006 Optical Society of America

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