Nanostructure formation of double-clad Cr⁴⁺:YAG crystal fiber grown by co-drawing laser-heated pedestal

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• 作者：Yen-Sheng Lin ; Chien-Chih Lai ; Kuang-Yao Huang ; Jian-Cheng Chen ; Chia-Yao Lo ; Sheng-Lung Huang ; Tao-Yuan Chang ; Jiun-Yu Ji and Pouyan Shen
• 关键词：A1. Interdiffusion ; B1. Nanocrystal ; B1. Cr⁺⁴ ; YAG crystal fiber
• 刊名：Journal of Crystal Growth
• 出版年：2006
• 期刊代码：49_00220248
• 类别：ch
• 出版时间：1 April 2006
• 卷：289
• 期：2
• 页码：515-519
• 文件大小：362 K

摘要

The microstructures of double-clad Cr⁴⁺:YAG crystal fibers grown using a co-drawing laser-heated pedestal growth method were studied by high-resolution transmission electron microscopy and photoluminescence spectroscopy. The core is single-crystalline garnet elongated in [1 1 1] direction, whereas inner cladding a composite of Cr³⁺:γ-Al₂O₃ nanocrystals in Cr⁴⁺: silicate glass due to YAG/SiO₂ inter-diffusion and a high crystal-field-stabilization energy of Cr³⁺ attained in close packed oxide. Cr⁴⁺ fluorescence intensity decreases and shifts to lower wavelength for the inner cladding in comparison with the core.