Photorefractive properties of undoped lithium tantalate crystals for various composition
Publication date
2004-12
Document type
Research article
Author
Organisational unit
Technische Universität Clausthal
Scopus ID
ISSN
Series or journal
Journal of applied physics : AIP's archival journal for significant new results in applied physics
Periodical volume
96
Periodical issue
12
First page
7455
Last page
7459
Part of the university bibliography
Nein
Abstract
Lithium tantalate crystals of compositions ranging from 48.3 mol % to 50.0 mol % lithium oxide are fabricated by vapor transport equilibration. Light-induced refractive index changes of the crystals are investigated with holographic methods at usual cw-laser intensities (≈ 105 W/m 2) and with a single focused laser beam at high light intensities up to 2 × 107 W/m2. In stoichiometric crystals the index changes are reduced by more than two orders of magnitude when compared with congruently melting ones. Simultaneously, the normalized photoconductivity σph/I, where I is the light intensity, increases by nearly two orders of magnitude. Therefore, stoichiometric lithium tantalate is an attractive material for applications such as frequency conversion via quasi-phase matching. © 2004 American Institute of Physics.
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Not applicable (or unknown)
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