TY - JOUR
T1 - Noncontact thermometry based on downconversion luminescence from Eu3+ doped LiNbO3 single crystal
AU - Liang, Zhang
AU - Qin, Feng
AU - Zheng, Yangdong
AU - Zhang, Zhiguo
AU - Cao, Wenwu
N1 - Funding Information:
This research was supported in part by National Key Basic Research Program (973 Program, Grant No. 2013CB632900 ), Natural Science Foundation of China (NSFC) (No. 61505045 ), China Postdoctoral Science Foundation funded project (No. 2014M561342 ), and the Fundamental Research Funds for the Central Universities and Program for Innovation Research of Science in Harbin Institute of Technology (No. B201415 ). Great thanks for the helpful discussion about software and programming from Dr. Yungang Zhang of Yanshan University and the help in crystal growth from Lili Xing of Sun Yat-sen University.
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - An optical temperature sensor (OTS) based on the fluorescence intensity ratio (FIR) method of Eu3+ in LiNbO3 (LN) single crystal has been developed, and this OTS can effectively avoid the fluorescence measurement disturbance due to the low scattering factor of the host LN single crystal. The sensitivity achieved here is as high as 3916/T2 (4% K-1 at 303 K) in the temperature range of 303-723 K by using FIRs between 5D0-7F2 (625 nm) and 5D1-7F1 (541 nm), and it is significantly superior compared with using the FIRs between 5D1-7F1 and 5D0-7F1 of traditional thermally coupled levels (TCLs). Because of the high fluorescence efficiency of this sample, strong fluorescence intensity with high signal to noise ratio (SNR) is achieved under a low excitation power density of only 0.2 W/cm2. In our OTS system the average acquisition time of temperature is less than 2 s and the resolution is as high as 0.3 K at 573 K.
AB - An optical temperature sensor (OTS) based on the fluorescence intensity ratio (FIR) method of Eu3+ in LiNbO3 (LN) single crystal has been developed, and this OTS can effectively avoid the fluorescence measurement disturbance due to the low scattering factor of the host LN single crystal. The sensitivity achieved here is as high as 3916/T2 (4% K-1 at 303 K) in the temperature range of 303-723 K by using FIRs between 5D0-7F2 (625 nm) and 5D1-7F1 (541 nm), and it is significantly superior compared with using the FIRs between 5D1-7F1 and 5D0-7F1 of traditional thermally coupled levels (TCLs). Because of the high fluorescence efficiency of this sample, strong fluorescence intensity with high signal to noise ratio (SNR) is achieved under a low excitation power density of only 0.2 W/cm2. In our OTS system the average acquisition time of temperature is less than 2 s and the resolution is as high as 0.3 K at 573 K.
UR - http://www.scopus.com/inward/record.url?scp=84952362115&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84952362115&partnerID=8YFLogxK
U2 - 10.1016/j.sna.2015.12.018
DO - 10.1016/j.sna.2015.12.018
M3 - Article
AN - SCOPUS:84952362115
SN - 0924-4247
VL - 238
SP - 215
EP - 219
JO - Sensors and Actuators, A: Physical
JF - Sensors and Actuators, A: Physical
ER -