Time-dependent surface-index change in ion-exchanged waveguides

被引：3

作者：

Gato, L

Srivastava, R

机构：

[1] Area de Optica Depto. de Fis. Apl., Facultade de Física, Univ. de Santiago de Compostela

[2] Department of Electrical Engineering, University of Florida, Gainsville

来源：

OPTICS COMMUNICATIONS | 1996年 / 123卷 / 4-6期

关键词：

Diffusion - Ion exchange - Ions - Refractive index - Silver - Sodium - Substrates - Surface phenomena;

D O I：

10.1016/0030-4018(95)00574-9

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present experimental evidence that the surface-index change (Delta n) in Ag+/Na+ exchanged waveguides increases with diffusion time. The final value, which is 10-15% larger than the initial value, is reached almost exponentially, with a characteristic time of 30-60 minutes, depending on substrate and melt concentration. Moreover, this change in Delta n is accompanied by a change in the ratio of the self-diffusion coefficients of the two ions, probably caused by the double-alkali effect.

引用

页码：483 / 486

页数：4