Kh. Giessler et al., GLASS WAVE-GUIDES PRODUCED BY ION-EXCHANGE - A CHARACTERIZATION BY RBS, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 117(4), 1996, pp. 447-451
Glass waveguides produced by ion-exchange are used for passive integra
ted optics applications. In order to predict the properties of these w
aveguides it is necessary to know the refractive index profile. Optica
l measurements are of limited usefulness for this purpose. However, th
e waveguides can also be characterized through the concentration profi
les of the exchanged ions. With Rutherford Backscattering Spectrometry
(RBS) it is possible to determine depth profiles of the exchanged ion
s in the glass substrate. Results for monomode, multimode and buried w
aveguides are reported and in the case of multimode waveguides they ar
e compared with those obtained by optical mode analysis.