Improvement of photorefractive properties of proton-exchanged LiTaO₃ waveguides
Publication date
1997
Document type
Research article
Author
Organisational unit
Universität Osnabrück
Scopus ID
ISSN
Series or journal
Applied Physics B Lasers and optics
Periodical volume
65
Periodical issue
4-5
First page
517
Last page
522
Part of the university bibliography
Nein
Abstract
Photorefractive planar waveguides in LiTaO3 are fabricated by both a proton exchange and a successive copper exchange. The influence of different fabrication steps on the refractive index profile and optical absorption is investigated. The holographic efficiency is determined together with the dark- and photo-conductivity. We show that the photorefractive properties of proton-exchanged LiTaO3 waveguides are considerably improved by the additional copper exchange. It is established that the holographic efficiency depends on the copper content, the phase of the proton-exchanged layer and the light intensity. © Springer-Verlag 1997.
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