CORRELATION OF REFRACTIVE-INDEX PROFILES WITH SUBSTITUTIONAL HYDROGEN CONCENTRATIONS IN ANNEALED PROTON-EXCHANGED LINBO3 WAVE-GUIDES

被引：20
作者：
ZAVADA, JM
CASEY, HC
CHEN, CH
LONI, A
机构：
[1] DUKE UNIV,DEPT ELECT ENGN,DURHAM,NC 27708
[2] DEF RES AGCY,GREAT MALVERN WR14 3PS,WORCS,ENGLAND
来源：
APPLIED PHYSICS LETTERS | 1993年 / 62卷 / 22期
关键词：
D O I：
10.1063/1.109255
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have studied the behavior of the extraordinary refractive index in a set of annealed z-cut proton-exchanged lithium niobate (LiNbO3) substrates by means of optical prism-coupling measurements and numerical simulations. Values of the index as a function of depth have been determined and fitted with a single Gaussian diffusion expression. At 400-degrees-C, the effective index diffusivity D(n) of 4.6 x 10(-12) cm-2/s is nearly identical to the diffusivity of substitutional H in these samples. Furthermore, we find a linear relationship between the increase in the extraordinary refractive index and the substitutional H concentration. At a wavelength of 0.6238 mum, the coefficient for this relationship is approximately 1.5 X 10(-23) (H cm-3)-1.
引用
收藏
页码：2769 / 2771
页数：3
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