Birefringence data on Ag+–Na+ ion-exchanged planar waveguides are presented that are experimentally determined by a high-frequency polarimetric technique. The examined systems exhibit positive stress-induced birefringence across the whole exchanged regions, corresponding to compressive stress fields of the order of 102 MPa. Furthermore, refractive-index profiles have been compared with compositional secondary-ion-mass spectrometry in-depth profiles and show that, in the case of silver–sodium exchange, the stress contribution to the index change is negligible with respect to the compositional one.
© 1992 Optical Society of AmericaFull Article | PDF Article
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