EXTRAORDINARY VERSUS ORDINARY REFRACTIVE-INDEX CHANGE IN PLANAR LINBO3-TI WAVE-GUIDES

被引:5
作者
FRIES, S
HERTEL, P
MENZLER, HP
机构
[1] Univ Osnabrueck, Osnabrueck, West Ger, Univ Osnabrueck, Osnabrueck, West Ger
来源
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH | 1988年 / 108卷 / 01期
关键词
LIGHT - Refraction - TITANIUM AND ALLOYS - WAVEGUIDES; OPTICAL;
D O I
10.1002/pssa.2211080148
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Various planar waveguides are fabricated by indiffusion of one or two titanium layers into y-cut LiNbO//3 substrates. The effective indices of guided TE- and TM-modes are measured for red, green, and blue light. The refractive index profiles are reconstructed by a new reliable inverse WKB procedure. Despite widely differing profiles there is, for each wavelength, a one to one relationship between the changes DELTA n//o of the ordinary and DELTA n//e of the extraordinary refractive index. For low and for high refractive index changes DELTA n//e and the DELTA n//o grow proportionally, but their ratios differ appreciably. The results support recent findings that the LiNbO//3:Ti system exists in two distinct phases.
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页码:449 / 455
页数:7
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