17 April 2006 Growth and noncritical phase matching second harmonic generation of Gd1-xRxCa4O(BO3)3 (R = Sc or Lu) nonlinear crystals
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Abstract
Single crystals of Gd1-xRxCa4O(BO3)3 (R3+ = Sc3+ or Lu3+) with large size and good quality have been grown by Czochralski method. By changing the compositional parameter x of Gd1-xScxCa4O(BO3)3 and Gd1-xLuxCa4O(BO3)3 crystals, their optical birefringence can be controlled in order to achieve non critical phase matching (NCPM) in the ranges of 792-824nm along Y axis and 922-963nm along Z axis, during second harmonic generations (SHG). The chemical compositions of the grown crystals were determined and X-ray diffraction measurements have been carried out to characterize the structural changes with compositional parameter x. The solubility limits of R3+ ions in the Gd4Ca4O(BO3)3 crystals were also determined. Nonlinear optical properties of these new biaxial borate crystals are reported. Experimental determinations of doubled frequencies in NCPM conditions are in good agreement with theoretical predictions.
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Lucian Gheorghe, Lucian Gheorghe, Pascal Loiseau, Pascal Loiseau, Gerard Aka, Gerard Aka, Takunori Taira, Takunori Taira, Voicu Lupei, Voicu Lupei, } "Growth and noncritical phase matching second harmonic generation of Gd1-xRxCa4O(BO3)3 (R = Sc or Lu) nonlinear crystals", Proc. SPIE 6190, Solid State Lasers and Amplifiers II, 61900Z (17 April 2006); doi: 10.1117/12.662596; https://doi.org/10.1117/12.662596
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