Highly sensitive optical thermometry based on the upconversion fluorescence from Yb3+/Er3+ codoped La2(WO4)3:Yb3+ ,Er3+ phosphor

Yan-min Yang; Chao Mi

doi:10.1117/12.2036247

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20 December 2013 Highly sensitive optical thermometry based on the upconversion fluorescence from Yb³⁺/Er³⁺ codoped La₂(WO₄)₃:Yb³⁺ ,Er³⁺ phosphor

Yan-min Yang, Chao Mi

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Proceedings Volume 9044, 2013 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 904408 (2013) https://doi.org/10.1117/12.2036247
Event: International Conference on Optical Instruments and Technology (OIT2013), 2013, Beijing, China

Abstract

An optical temperature sensor based on Yb³⁺ and Er³⁺ codoped La2(WO4)3 phosphor for using in the high temperature region is discussed on the basis of fluorescence intensity ratio (FIR) method. The dependence of temperature on the upconversion green emission was intensive studied when the temperature increased from 300 K to 550 K under the excitation of 971 nm laser diode. The fluorescence intensity ratio of the two green emissions bands centered at 525 nm, 545 nm changed dramatically with the thermal treatment. By analyzing the experimental data according to the FIR method, the result on the thermometric property of La₂(WO₄)₃:Yb³⁺, Er³⁺ was obtained and it shows that the sensitivity of La₂(WO₄)₃:Yb³⁺, Er³⁺ reached the maximal value of about 0.0097 K-1 at the temperature of 510 K, even when the temperature was as high as 900 K, the sensitivity could still exceed 0.007 K-1. Results indicate that La₂(WO₄)₃:Yb³⁺, Er³⁺ has higher sensitivity for thermometry in high temperature area. Owing to its good thermal stability, low synthesis cost and high sensitivity, La₂(WO₄)₃: Yb³⁺, Er³⁺ phosphor has potential application in optical temperature sensing.

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Yan-min Yang and Chao Mi "Highly sensitive optical thermometry based on the upconversion fluorescence from Yb³⁺/Er³⁺ codoped La₂(WO₄)₃:Yb³⁺ ,Er³⁺ phosphor", Proc. SPIE 9044, 2013 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 904408 (20 December 2013); https://doi.org/10.1117/12.2036247

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