An optical temperature sensor based on the upconversion luminescence from Tm³⁺/Yb³⁺ codoped oxyfluoride glass ceramic

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• 作者：Wei Xu ; Xiaoyang Gao ; Longjiang Zheng ; Zhiguo Zhang ; Wenwu Cao
• 关键词：Oxyfluoride glass ceramic ; Tm3+ ions ; Upconversion emissions ; Temperature sensor
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：173
• 期：Complete
• 页码：250-253
• 全文大小：406 K

文摘

An optical temperature sensor based on the upconversion luminescence of Tm³⁺ has been developed. Under a 980 nm diode laser excitation, the fluorescence intensity ratio (FIR) between 700 (Tm³⁺:³F₂,₃ ¡ú ³H₆) and 800 nm (Tm³⁺:³H₄ ¡ú ³H₆) upconversion emissions from Tm³⁺/Yb³⁺ codoped oxyfluoride glass ceramic was studied as a function of temperature in the range of 293-703 K. The ³F₂,₃ and ³H₄ states of Tm³⁺ are verified to be thermally coupled levels. By using FIR technique, the sensitivity for detecting temperature variations achieved here is better than previous reported rare earth ions fluorescence based temperature sensors. With the advantages of intense upconversion luminescence and absolutely separated 700 and 800 nm emission bands, the Tm³⁺/Yb³⁺ codoped oxyfluoride glass ceramic is a very promising candidate for accurate optical temperature sensors with much higher sensitivity and resolution.