Spatial anisotropy of linear electro-optic effect in crystal materials: II. Indicative surfaces as efficient tool for electro-optic coupling optimization in LiNbO3

Autor(en)

Anatoliy S Andrushchak, Bogdan G Mytsyk, Nataliya M Demyanyshyn, Mykola V. Kaidan, Oleh V. Yurkevych, S S Dumych, Andri V Kityk, Wilfried Schranz

Abstrakt

The electro-optic (EO) properties Of pure and MgO-doped LiNbO(3) crystals are characterized by indicative surfaces (IS) describing the spatial anisotropy of the longitudinal and transverse linear EO effects. By analyzing the IS and their stereographic projections, we have determined the geometries with maximum EO coupling. The maximum magnitudes of the linear EO effect are revealed in the longitudinal and transverse geometries along the directions that substantially deviate from the principal crystallographic axes of both crystals. Spatial analysis of the IS thus yields a set of the optimized sample geometries recommended for designers who develop EO modulators or deflectors. just by switching from the standard cell geometry to the optimized cell geometry, as determined in the present work, one may improve almost three times the modulation efficiency of EO devices based on lithium niobate crystals. This results in a corresponding reduction of their driving voltages being evidently of great practical importance for many applications.

Organisation(en)

Physik Funktioneller Materialien

Externe Organisation(en)

Lviv Polytechnic National University, Karpenko Physico-Mechanical Institute, Czestochowa University of Technology (CUT)

Journal

Optics and Lasers in Engineering

Band

47

Seiten

24-30

Anzahl der Seiten

7

ISSN

0143-8166

DOI

https://doi.org/10.1016/j.optlaseng.2008.08.007

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

103021 Optik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/7f9dc3d6-3feb-43cc-a836-52c38dee8bb3