Elimination of out‐diffused surface guiding in titanium‐diffused LiNbO3
作者:
J. L. Jackel,
V. Ramaswamy,
S. P. Lyman,
期刊:
Applied Physics Letters
(AIP Available online 1981)
卷期:
Volume 38,
issue 7
页码: 509-511
ISSN:0003-6951
年代: 1981
DOI:10.1063/1.92433
出版商: AIP
数据来源: AIP
摘要:
We describe a means of eliminating undesired surface guiding in titanium‐diffused strip waveguides on LiNbO3. Surface guiding for light of the extraordinary polarization, normally produced when the crystal is diffused in dry argon or oxygen, can be eliminated entirely by adding water vapor to the diffusion gases. Infrared absorption measurements show that hydrogen enters crystals diffused in a wet atmosphere. Although the mechanism for the prevention of surface guiding is not fully understood, we suggest that the presence of excess hydrogen reduces lithium mobility.
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