Poling-inhibited ridge waveguides in lithium niobate crystals

被引：14
|
作者：
Sones, C. L. [1 ]
Ganguly, P. [2 ]
Ying, C. Y. J. [1 ]
Soergel, E. [3 ]
Eason, R. W. [1 ]
Mailis, S. [1 ]
机构：
[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
[2] Indian Inst Technol, Adv Technol Dev Ctr, Kharagpur 721302, W Bengal, India
[3] Univ Bonn, Inst Phys, D-53115 Bonn, Germany
来源：
APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 15期
关键词：
PROTON-EXCHANGE; LINBO3; WAVEGUIDES; MODULATOR; ETCH;
D O I：
10.1063/1.3504698
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Ultraviolet laser irradiation of a lithium niobate +z polar surface enables the production of ridge waveguides. Ultraviolet laser induced inhibition of poling is used to define an inverted domain pattern which transforms into a ridge structure by differential etching in hydrofluoric acid. The laser irradiation step also induces a refractive index change that provides the vertical confinement within the ridge structure. Furthermore, it was observed that poling-inhibition results in a significant enhancement of the refractive index contrast between the bulk crystal and the ultraviolet irradiated tracks. (C) 2010 American Institute of Physics. [doi:10.1063/1.3504698]
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页数：3
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