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首页> 外文期刊>Optical Materials >Ho~(3+) ion in a (Ba, La)-tellurite glass: Strong ～2.0 μm NIR emission and Yb~(3+) aided efficient NIR to vis upconversion
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Ho~(3+) ion in a (Ba, La)-tellurite glass: Strong ～2.0 μm NIR emission and Yb~(3+) aided efficient NIR to vis upconversion

机译：（Ba，La）碲酸盐玻璃中的Ho〜（3+）离子：强大的〜2.0μmNIR发射和Yb〜（3+）辅助高效NIR进行上转换

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摘要

(Ba, La)-tellurite glasses doped respectively with only Yb~(3+), only Ho~(3+) and co-doped with (Yb~(3+) + Ho~(3+)) have been prepared and their optical properties are studied. The experimental absorption and the emission spectra of the Ho~(3+) doped glass and calculations of its various Judd-Ofelt parameters, show that the Ho~(3+) ion in the glass has superior absorption and emission transition probabilities and higher emission rates and emission cross-sections. Similar spectroscopic studies on the Yb~(3+)/Ho~(3+) co-doped - glass; on the other hand, demonstrate that the ～2.0 μm emission of Ho~(3+) of the glass can further be enhanced by phonon assisted non-resonance energy transfer from Yb~(3+). The derived emission cross-section spectrum of the ~5I_7 → ~5I_8 transition of Ho~(3+) of the glass and its related gain spectrum, indicate that the glass is prospective for use as a tunable solid state laser medium in this spectral region 1.972-2.053 urn. Yb~(3+) → Ho~(3+) energy transfer phenomenon also helps the Ho~(3+) ions of the co-doped glass to exhibit strong green (545 nm) and red (600 nm) upconversion emission upon excitation of its Yb~(3+) ions by 980 nm laser. All the observed superior optical properties of Ho~(3+) ion in the glass have been explained in the light of crystal field effect of the host.
机译：分别制备了仅掺杂Yb〜（3+），仅掺杂Ho〜（3+）和共掺杂（Yb〜（3+）+ Ho〜（3+））的（Ba，La）碲玻璃。研究了它们的光学性质。 Ho〜（3+）掺杂玻璃的实验吸收和发射光谱以及其各种Judd-Ofelt参数的计算表明，玻璃中的Ho〜（3+）离子具有优异的吸收和发射跃迁几率和更高的发射率率和发射截面。 Yb〜（3 +）/ Ho〜（3+）共掺杂玻璃的相似光谱研究；另一方面，证明通过声子辅助的非共振能量从Yb〜（3+）转移可以进一步提高玻璃中Ho〜（3+）的〜2.0μm发射。玻璃的Ho〜（3+）的〜5I_7→〜5I_8跃迁的导出发射截面光谱及其相关的增益光谱表明，该玻璃有望在此光谱区域中用作可调谐固态激光介质。 1.972-2.053 ur。 Yb〜（3+）→Ho〜（3+）的能量转移现象还有助于共掺杂玻璃的Ho〜（3+）离子在激发时表现出较强的绿色（545 nm）和红色（600 nm）上转换发射980 nm激光检测其Yb〜（3+）离子根据基质的晶体场效应，已经解释了玻璃中所有观察到的Ho〜（3+）离子的优异光学性能。

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