| Ho3+/Yb3+共掺碲酸盐玻璃的上转换发光及能量传递机理 |
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| 引用本文： | 徐星辰,周亚训,王森,魏淑林,戴世勋,王训四.Ho3+/Yb3+共掺碲酸盐玻璃的上转换发光及能量传递机理[J].光电子．激光,2012(8):1500-1508. |
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| 作者姓名： | 徐星辰 周亚训 王森 魏淑林 戴世勋 王训四 |
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| 作者单位： | 宁波大学信息科学与工程学院;宁波大学信息科学与工程学院;宁波大学信息科学与工程学院;宁波大学信息科学与工程学院;宁波大学信息科学与工程学院;宁波大学信息科学与工程学院 |
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| 基金项目： | 国家自然科学基金(61178063);浙江省研究生创新科研基金(YK2010048);宁波市自然科学基金(2010A610172);宁波大学宽诚幸福基金;胡岚优秀博士基金资助项目 |
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| 摘 要： | 用高温熔融法制备了Ho3+单掺和Ho3+/Yb3+共掺、组分为TeO2-ZnO-Na2O的碲酸盐玻璃,应用Judd-Ofelt(JO)理论计算分析了玻璃的强度参数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。通过测量上转换光谱,着重研究了Yb3+掺杂对于Ho3+上转换发光性能的影响,分析了Yb3+/Yb3+以及Yb3+/Ho3+间的能量传递过程。结果显示,975nm泵浦下Ho3+的上转换发光主要来自于Yb3+/Yb3+间的共振能量传递以及基于单声子和双声子辅助的Yb3+/Ho3+间的能量传递过程,并计算得到了声子贡献比和能量传递微观参数。同时,计算分析了Ho3+:5 I7→5 I8能级跃迁的吸收截面、受激发射截面和增益系数。研究表明,Yb3+/Ho3+共掺TeO2-ZnO-Na2O玻璃可以作为上转换激光器和2.0μm波段固体激光器的潜在增益基质。
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| 关 键 词： | 碲酸盐玻璃 Ho3+/Yb3+共掺 能量传递 上转换发光 |
Upconversion emission and energy transfer mechanism of Ho3+/Yb3+ co-doped tellurite glasses |
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| XU Xing-chen,ZHOU Ya-xun,WEI Shu-lin,DAI Shi-xun and WANG Xun-si.Upconversion emission and energy transfer mechanism of Ho3+/Yb3+ co-doped tellurite glasses[J].Journal of Optoelectronics·laser,2012(8):1500-1508. |
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| Authors: | XU Xing-chen ZHOU Ya-xun WEI Shu-lin DAI Shi-xun and WANG Xun-si |
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| Affiliation: | College of Information Science and Engineering,Ningbo University,Ningbo 315211,China;College of Information Science and Engineering,Ningbo University,Ningbo 315211,China;College of Information Science and Engineering,Ningbo University,Ningbo 315211,China;College of Information Science and Engineering,Ningbo University,Ningbo 315211,China;College of Information Science and Engineering,Ningbo University,Ningbo 315211,China;College of Information Science and Engineering,Ningbo University,Ningbo 315211,China |
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| Abstract: | Ho3+ single-doped and Ho3+/Yb3+ co-doped tellurite glasses with the composition of TeO2-ZnO-Na2O were prepared by melt-quenching method.The intensity parameters Ωt(t=2,4,6),spontaneous radiative transition rate A,fluorescence branching ratio β and radiative lifetime τrad of Ho3+ are calculated based on the measured absorption spectra with the Judd-Ofelt theory.The influence of Yb3+ doping on the Ho3+ upconversion emission is investigated through the measurement of upconversion spectra,and the energy transfer mechanisms between the Yb3+/Yb3+ and Yb3+/Ho3+ ions are analyzed in detail.The results show that the upconversion emission of Ho3+ ions under 980 nm diode laser excitation is mainly the result of energy transfers:first the resonant energy transfer from Yb3+ to Yb3+ ions,and then the one and two phonon-assisted nonresonant energy transfer from Yb3+ to Ho3+ ions.The energy transfer coefficient and phonon contribution for the above energy transfer process are calculated and analyzed.Meanwhile,the absorption,emission cross-sections and gain coefficient of Ho3+:5I7→5I8 transitions are calculated.The research shows that the Yb3+/Ho3+ co-doped TeO2-ZnO-Na2O glass is a promising host material applied for upconversion laser and 2.0 μm-band solid laser. |
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| Keywords: | tellurite glasses Ho3+/Yb3+ co-doping energy transfer upconversion emission |
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