光子学报, 2017, 46 (9): 0916003, 网络出版: 2017-10-16   

Tm3+/Yb3+共掺氟氧化物碲酸盐玻璃的上转换发光及光学温度传感

Up-conversion Light-emitting and Optical Temperature Sensing for Tm3+/Yb3+ Codoped Oxyfluoride Tellurite Glass
作者单位
1 辽宁工业大学 机械工程与自动化学院,辽宁 锦州 121001
2 辽宁工业大学 化学与环境工程学院,辽宁 锦州 121001
3 辽宁工业大学 材料科学与工程学院,辽宁 锦州 121001
摘要
采用高温熔融淬火法成功的合成了Tm3+/Yb3+共掺杂的含有不同浓度Tm3+的氟氧化物碲酸盐玻璃.测量了样品的吸收光谱,结果表明Yb3+和Tm3+成功掺入到玻璃基质中.在 980 nm激发下,样品在801 nm(3H4→3H6)发射最强,在476 nm(1G4→3H6)和651 nm(1G4→3F4)发射较弱;分析了上转换发光强度与Tm3+浓度依赖关系,确定了上转换发光的最佳掺杂浓度为 0.1% Tm2O3;探讨Tm3+的上转换发光机理和Tm3+的浓度猝灭机理,结果表明在980 nm激发下Tm3+获得的能量主要来自于Yb3+→Tm3+的量传递,Tm3+的浓度猝灭机理为Tm3+-Tm3+之间的交叉弛豫导致的无辐射能量传递,根据能量匹配的原则,给出可能的交叉弛豫通道.此外,在980 nm 激发以 3F2,3 和 3H4作为热耦合能级研究分析了Tm3+在氟氧化物碲酸盐玻璃中的温度传感性能,结果表明灵敏度随温度的升高而升高,说明Tm3+掺杂的氟氧化物碲酸盐玻璃可以作为光纤传感材料,且在高温灵敏度更佳.
Abstract
A series of Tm3+/Yb3+ co-doped oxyfluoride tellurite glasses with various Tm3+ concentrations was synthesized via a conventional high temperature solid state method. Absorption spectra showed that Yb3+ and Tm3+ were successfully incorporated into the matrix. The sample exhibited strong 801 nm emissions corresponding to 3H4→3H6 transitions, with weak 476 and 651 emission respectively corresponding to the 1G4→3H6 and 1G4→3F4 transition.Concentration dependence of up conversion luminescence was analyzed and it was found that the optimal Tm2O3 concentration for achieving maximum upconversion emission intensity was 0.1%.Up conversion luminescence mechanism and concentration quenching were studied by emission spectra. Tm3+ ions obtained energy mainly comes from the energy transfer from Yb3+ to Tm3+. The concentration quenching was attributed to the nonradiative energy transfer through cross relaxation mechanism due to dipole-dipole interaction between Tm3+. Based on this rule, the possible energy transfer processes can be1G4+3H6→3H5+3H4,1G4+3H6→3H4+3H5, 1G4+3H6→3F2,3+3F4 and 3H5+3H5→3H6+3F2. Additionally, the optical temperature sensing properties were investigated by using the thermal coupling 3F2,3 and 3H4 levels of Tm3+ under near infrared 980 nm excitation. The sample can be used as sensing material and better in high temperature sensitivity.

吴中立, 吴红梅, 唐立丹, 李煜, 郭宇, 姚震. Tm3+/Yb3+共掺氟氧化物碲酸盐玻璃的上转换发光及光学温度传感[J]. 光子学报, 2017, 46(9): 0916003. WU Zhong-li, WU Hong-mei, TANG Li-dan, LI Yu, GUO Yu, YAO Zhen. Up-conversion Light-emitting and Optical Temperature Sensing for Tm3+/Yb3+ Codoped Oxyfluoride Tellurite Glass[J]. ACTA PHOTONICA SINICA, 2017, 46(9): 0916003.

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