The sequential electric field assisted diffusion of two ion species into glass was modelled here. Using standard assumptions, two coupled non-linear drift-diffusion equations were derived for the ion concentration distributions. These equations were solved numerically for the case where the two ion species each have a lower mobility than the indigenous sodium ions in the glass. It was shown that stationary state distributions form if the final species injected into the glass was the less mobile of the two. Analytical expressions were derived for the stationary state distributions. A possible application in integrated optics involving Ag+ and Cu+ ion diffusion was

considered.

Modeling the Sequential Electric Field Assisted Diffusion Into Glass of Two Ion Species. R.Oven: Journal of Applied Physics, 2007, 101[11], 113113