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Tm3+/Ho3+共掺碲酸盐玻璃的中红外发光及能量传递机理

Mid-Infrared Luminescence and Energy Transfer Mechanism of Tm3+/Ho3+ Co-Doped Tellurite Glasses

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摘要

用高温熔融法制备了Tm3+/Ho3+共掺碲酸盐玻璃(TeO2-ZnO-Na2O),根据测量得到的吸收光谱,应用Judd-Ofelt理论计算分析了玻璃样品中Ho3+离子的强度参数Ωt(t=2,4,6)、自发辐射跃迁几率A、荧光分支比β和荧光辐射寿命τrad等各项光谱参数。同时,测量得到了不同Ho3+离子掺杂浓度下玻璃样品的荧光发射谱。结果显示,在808 nm抽运光激励下Tm3+/Ho3+共掺碲酸盐玻璃样品发射出较强的2.0 μm中红外荧光。分析表明,较强的Ho3+离子中红外荧光来自于Tm3+/Tm3+离子间共振的能量传递过程,以及Tm3+/Ho3+离子间基于零声子和单声子辅助非共振的两部分能量传递过程。由此进一步计算得到了Tm3+/Tm3+、Tm3+/Ho3+离子间的能量传递微观速率、临界半径和声子的贡献。最后,计算分析了Ho3+5I7→5I8能级间跃迁的2.0 μm波段吸收截面、受激发射截面和增益系数。研究表明,Tm3+/Ho3+共掺TeO2-ZnO-Na2O玻璃可以作为2.0 μm波段中红外固体激光器的潜在增益基质。

Abstract

Tm3+/Ho3+ co-doped tellurite glasses with the composition of TeO2-ZnO-Na2O are prepared by the high temperature melt-quenching method. The intensity parameters Ωt(t=2,4,6), spontaneous radiative transition rates A, fluorescence branching ratios β and radiation lifetimes τrad of Ho3+ are calculated from the measured absorption spectra with the Judd-Ofelt theory. Meanwhile, the fluorescence spectra of glass samples with different doped concentration of Ho3+ ions are measured, and the results show the intense mid-infrared fluorescence emission around 2.0 μm band in the Tm3+/Ho3+ co-doped tellurite glasses pumped by 808 nm diode laser. The analysis indicates that the mid-infrared emission of Ho3+ ions is mainly the result of resonant energy transfer from Tm3+ to Tm3+ ions, and then zero phonon- and one phonon-assisted nonresonant energy transfer from Tm3+ to Ho3+ ions. The energy transfer micro-rates, critical radius and phonon contributions for the above energy transfer process are calculated and analyzed. Meanwhile, the absorption, stimulated emission cross-sections and gain coefficient of Ho3+5I7→5I8 transitions are calculated. The research shows that Tm3+/Ho3+ co-doped TeO2-ZnO-Na2O glass is a promising host material applied for 2.0 μm-band mid-infrared solid laser.

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中图分类号:TQ171

DOI:10.3788/cjl201239.1006002

所属栏目:材料与薄膜

责任编辑:韩峰  信息反馈

基金项目:国家自然科学基金(61178063)、浙江省研究生创新科研项目(YK2010048)、宁波“新型光电功能材料及器件”创新团队项目(2009B21007)、宁波大学王宽诚幸福基金和胡岚优秀博士基金资助课题。

收稿日期:2012-06-05

修改稿日期:2012-06-21

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作者单位    点击查看

徐星辰:宁波大学信息科学与工程学院, 浙江 宁波 315211
周亚训:宁波大学信息科学与工程学院, 浙江 宁波 315211
戴世勋:宁波大学信息科学与工程学院, 浙江 宁波 315211
王训四:宁波大学信息科学与工程学院, 浙江 宁波 315211
郑世超:宁波大学信息科学与工程学院, 浙江 宁波 315211
殷丹丹:宁波大学信息科学与工程学院, 浙江 宁波 315211

联系人作者:徐星辰(349510119@qq.com)

备注:徐星辰(1989—),男,硕士研究生,主要从事稀土离子发光及能量传递方面的研究。

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引用该论文

Xu Xingchen,Zhou Yaxun,Dai Shixun,Wang Xunsi,Zheng Shichao,Yin Dandan. Mid-Infrared Luminescence and Energy Transfer Mechanism of Tm3+/Ho3+ Co-Doped Tellurite Glasses[J]. Chinese Journal of Lasers, 2012, 39(10): 1006002

徐星辰,周亚训,戴世勋,王训四,郑世超,殷丹丹. Tm3+/Ho3+共掺碲酸盐玻璃的中红外发光及能量传递机理[J]. 中国激光, 2012, 39(10): 1006002

被引情况

【1】殷丹丹,周亚训,郑世超,徐星辰,王训四,戴世勋. Er3+/Tm3+共掺TeO2-ZnO-Na2O玻璃的近红外光谱特性及能量传递机理. 中国激光, 2013, 40(9): 906001--1

【2】姚传飞,贾志旭,王顺宾,康喆,赵丹,秦伟平,秦冠仕. Tm3+掺杂碲酸盐微结构光纤激光器. 发光学报, 2014, 35(9): 1109-1113

【3】倪屹,王凯,周圣明,陈冲,易学专,丰岳. 可用于白光LED的Ce,Pr:YAG荧光透明陶瓷的制备及研究. 中国激光, 2015, 42(2): 206005--1

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