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The growth of β-BaB 2 O 4 (β-BBO) crystal fibers by the micro-pulling down technique

Abstract : BaB2O4 is an interesting material for the generation of VUV sources. It has good physical properties such as: a large birefrengence, a wide transparent waveband(190 to 3500 nm), a low dispersion, and high damage thresholds. Moreover, BaB2O4ispresent 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 [1]. 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 [2]. The crystal fibers are formed from supercooled melt [3], 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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https://hal.univ-lorraine.fr/hal-03090764
Contributor : Marianne Cochez <>
Submitted on : Wednesday, December 30, 2020 - 9:51:46 AM
Last modification on : Wednesday, January 6, 2021 - 3:40:54 AM

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  • HAL Id : hal-03090764, version 1

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Marianne Cochez, Nawal Ferdi, Alain Maillard, Régine Maillard. The growth of β-BaB 2 O 4 (β-BBO) crystal fibers by the micro-pulling down technique. 8th German-French Workshop on Oxides, Dielectrics and Lasers single crystals (WODIL), Sep 2019, Villeurbanne, France. ⟨hal-03090764⟩

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