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Les oxoborates de calcium et de terres rares (TR) Ca4TRO(BO3)3. Une nouvelle famille de matériaux à fonctions multiples pour l'optique : croissance cristalline, propriétés non linéaires et laser

Abstract : The aim of this work is to study a new family of non linear compounds Ca4REO(BO3)3 (where RE is set for lanthanide or yttrium). The second order non linear properties for the GdCOB (Ca4GdO(BO3)3) and YCOB (Ca4YO(BO3)3) compounds were characterised. These materials favorably compare with commercialised non linear borates such as LBO and BBO. Crystal growth was performed by using the Czochralski method, allowing large size single crystals (diameter 50 mm and length 100 to 120 mm) with good optical quality. Moreover crystals are totally unsensitive to moisture. Luminescent lanthanide ions (neodymium or ytterbium) can be inserted in the non linear matrix and single crystals were grown by the Czocralski method. The study of the optical properties leads to demonstrate the laser effect under titanium sapphire or laser diode pumping in the infrared range (around 1060 nm) for the neodymium and ytterbium doped GdCOB and for the neodymium doped YCOB. Finally, non linear properties and laser effect can be combined and give rise to blue or green continuous visible laser sources, by self frequency doubling or self sum frequency. The obtained performances together with availability of large size crystal can lead to the realisation of microchip lasers.
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https://pastel.archives-ouvertes.fr/pastel-00001068
Contributor : Ecole Chimie Paristech <>
Submitted on : Tuesday, February 22, 2005 - 8:00:00 AM
Last modification on : Tuesday, February 22, 2005 - 8:00:00 AM
Long-term archiving on: : Thursday, September 30, 2010 - 6:18:14 PM

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Frédéric Mougel. Les oxoborates de calcium et de terres rares (TR) Ca4TRO(BO3)3. Une nouvelle famille de matériaux à fonctions multiples pour l'optique : croissance cristalline, propriétés non linéaires et laser. Chemical Sciences. Chimie ParisTech, 1999. English. ⟨pastel-00001068⟩

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