期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 173, 期 -, 页码 250-253出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.07.009
关键词
Oxyfluoride glass ceramic; Tm3+ ions; Upconversion emissions; Temperature sensor
资金
- Harbin City Bureau of Science and Technology Key Project Fund [2009AA3BS131]
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+:F-3(2,3) -> H-3(6)) and 800 nm (Tm3+:H-3(4) -> H-3(6)) upconversion emissions from Tm3+/Yb3+ codoped oxyfluoride glass ceramic was studied as a function of temperature in the range of 293-703 K. The F-3(2,3) and H-3(4) 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. (C) 2012 Elsevier B.V. All rights reserved.
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