Optical thermometry based on the thermal coupling of low-lying levels of Sm3+ in highly stable NaGdF4 glass ceramics
Optical thermometry based on the thermal coupling of low-lying levels of Sm3+ in highly stable NaGdF4 glass ceramics
复制标题
基于高稳定 NaGdF4 玻璃陶瓷中低层 Sm3 热耦合的光学测温
DOI：
10.1016/j.jallcom.2021.159160
复制
发表时间：
2021-02-17
影响因子：
6.2
通讯作者：
Duan, Changkui
中科院分区：
文献类型：
--
作者：
Hu, Fangfang;Jiang, Yuncheng;Duan, Changkui
基于一种新的基态热耦合方案，在热稳定性较高的掺Sm~(3+)六方NaGdF_4玻璃中实现了高灵敏度温度传感。采用两种工艺制作了具有较宽温度工作范围和较高相对灵敏度的温度传感器。在共振激发下，Sm3+从热激活的H-6(7/2)(过程A)和H-6(9/2)(过程B)直接填充到(4)G(5/2)，而不是基态H-6(5/2)。提出了用(4)G(5/2)的反斯托克斯发光强度随温度的增加来确定温度。在303.6~570K和390~773K的相对灵敏度分别为139,300/T~(-2)(%/K)和282,300/T~(-2)(%/K)。该方法不仅有效地消除了激光和背景斯托克斯型散射噪声引起的加热效应，而且由于单光子激发过程提供了高的量子效率。NaGdF4：Sm3+微晶玻璃结合了玻璃的高热稳定性和氟化物的低声子能量的优点，在宽温度范围和高灵敏度的光纤温度传感方面具有相当大的潜在应用前景。(C)2021年爱思唯尔B.V.保留所有权利。
Based on a new scheme of ground state thermal coupling, high sensitive temperature sensing has been realized in the Sm3+ doped hexagonal NaGdF4 glass with high thermal stability. Two processes were used to create a temperature sensor with a wide temperature operating range and high relative sensitivity. Under resonance excitation, Sm3+ was directly populated to (4)G(5/2) from thermally activated H-6(7/2) (process A) and H-6(9/2) (process B) rather than ground state H-6(5/2). The increase in the anti-Stokes luminescence intensity from (4)G(5/2) with temperature was proposed to determine temperature. Relative sensitivity is 139,300/T-2 (%/K) at 303.6-570 K for process A and 282,300/T-2 (%/K) at 390-773 K for process B. The proposed approach not only effectively eliminates the heating effect caused by a laser and background Stokes-type scattering noise but also provides high quantum efficiency because of the one-photon excitation process. Combine the advantages of high thermal stability of glass and low phonon energy of fluoride, NaGdF4:Sm3+ glass ceramics have considerable potential applications in fiber optic temperature sensing with a wide temperature range and high sensitivity. (C) 2021 Elsevier B.V. All rights reserved.