Second-harmonic generation of green light in periodically poled stoichiometric LiTaO3 doped with MgO

Periodically poled crystals of stoichiometric lithium tantalate doped with MgO (PP-Mg:SLT) were developed for a high-power optical frequency conversion. Inverted domain structures with 7.7μm period were fabricated in 1-mm-thick crystals by an electric-field poling using patterned metallic electrodes...

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Bibliographic Details
Published in:Journal of applied physics 2004-12, Vol.96 (12), p.7445-7449
Main Authors: Bruner, Ariel, Eger, David, Ruschin, Shlomo
Format: Article
Language:English
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Summary:Periodically poled crystals of stoichiometric lithium tantalate doped with MgO (PP-Mg:SLT) were developed for a high-power optical frequency conversion. Inverted domain structures with 7.7μm period were fabricated in 1-mm-thick crystals by an electric-field poling using patterned metallic electrodes. Frequency-doubling characteristics of these units were investigated with continuous and pulsed Nd:YAG lasers. The nonlinear coefficient, d33, of Mg:SLT derived from these measurements is 13pm∕V, similar to that of the congruent lithium tantalate. A stable generation of 5.5W average power of green light at 532nm was obtained while the photoinduced breakdown of the periodically poled KTiOPO4 was observed under similar experimental conditions. These results demonstrate the advantage of Mg:SLT for high-average-power applications.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1804616