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
收藏
页码：483 / 486
页数：4
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