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The growth of β-BaB2O4 (β-BBO) crystal fibers by the micro-pulling down technique

Abstract : β-BaB2O4 is an interesting material for the generation of VUV sources. It has good physical properties such as a large birefringence, a wide transparent waveband (190 to 3500 nm), a low dispersion, and high damage thresholds. Moreover, BaB2O4 is present in two crystalline solid phases usually indicated as α-BaB2O4 and β-BaB2O4 distinguished as the high-temperature phase and the low-temperature phase, respectively. The β-BaB2O4 is non-centrosymmetric and important for harmonic generation devices. Traditionally, the crystals of β-BaB2O4 are grown both by top-seeded solution growth and Czochralski melt-growth methods. In this work, we obtain single-crystal fiber of β-BBO by micro-pulling down (μ-PD) technique. The crystal fibers are formed from supercooled melt, using oriented seed with 0.1 mm/min as pulling rate. Further, characterizations by Optical microscopy and Raman spectroscopy have been performed to identify the crystal fibers quality.
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Submitted on : Tuesday, March 30, 2021 - 3:47:10 PM
Last modification on : Wednesday, November 3, 2021 - 4:48:35 AM


  • HAL Id : hal-03185786, version 1


Nawal Ferdi, Marianne Cochez, Alain Maillard. The growth of β-BaB2O4 (β-BBO) crystal fibers by the micro-pulling down technique. 8th German-French Workshop on Oxides, Dielectrics and Lasers single crystals (WODIL), Sep 2019, Lyon, France. ⟨hal-03185786⟩



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