title: Model for waveguide fabrication in glass by two-step ion exchange with ionic masking.
abstract: A theory for optical waveguide fabrication processes, in which potassium ions exchanged into glass are used as a mask to regulate a subsequent silver-ion exchange, is presented. The model is used to examine the use of this technique in restricting the width of narrow-channel waveguides. The diffusion of silver through the potassium-ion mask is calculated, and a novel method of fabricating buried waveguides is described.
authors.forename: A
authors.initials: A
authors.lastname: Tervonen
authors.forename: S
authors.initials: S
authors.lastname: Honkanen