scholarly journals Fluorescence intensity ratio and whispering gallery mode techniques in optical temperature sensors: comparative study

2019 ◽  
Vol 9 (10) ◽  
pp. 4126
Author(s):  
F. Paz-Buclatin ◽  
S. Ríos ◽  
I. R. Martín ◽  
L. L. Martin
Keyword(s):  
Comparative Study ◽  
Fluorescence Intensity ◽  
Intensity Ratio ◽  
Whispering Gallery Mode ◽  
Temperature Sensors ◽  
Fluorescence Intensity Ratio ◽  
Whispering Gallery

Strain-independent temperature measurement by use of a fluorescence intensity ratio technique in optical fiber

2000 ◽  
Vol 39 (18) ◽  
pp. 3050 ◽  
Author(s):  
Scott A. Wade ◽  
Stephen F. Collins ◽  
Kenneth T. V. Grattan ◽  
Gregory W. Baxter
Keyword(s):  
Optical Fiber ◽  
Temperature Measurement ◽  
Fluorescence Intensity ◽  
Intensity Ratio ◽  
Fluorescence Intensity Ratio

scholarly journals Detecting Variable Resistance by Fluorescence Intensity Ratio Technology

Sensors ◽  
2019 ◽  
Vol 19 (10) ◽  
pp. 2400 ◽  
Author(s):  
Wanjun Sheng ◽  
Xiangfu Wang ◽  
Yong Tao ◽  
Xiaohong Yan
Keyword(s):  
Fluorescence Intensity ◽  
Intensity Ratio ◽  
Negative Temperature ◽  
Relative Sensitivity ◽  
New Method ◽  
Fluorescence Intensity Ratio ◽  
Time Intervals ◽  
Variable Resistance ◽  
Reduced Graphene ◽  
Short Time

We report a new method for detecting variable resistance during short time intervals by using an optical method. A novel variable-resistance sensor composed of up-conversion nanoparticles (NaYF4:Yb3+,Er3+) and reduced graphene oxide (RGO) is designed based on characteristics of a negative temperature coefficient (NTC) resistive element. The fluorescence intensity ratio (FIR) technology based on green and red emissions is used to detect variable resistance. Combining the Boltzmann distributing law with Steinhart–Hart equation, the FIR and relative sensitivity SR as a function of resistance can be defined. The maximum value of SR is 1.039 × 10−3/Ω. This work reports a new method for measuring variable resistance based on the experimental data from fluorescence spectrum.

Enhanced up-conversion and temperature-sensing behaviour of Er3+ and Yb3+ co-doped Y2Ti2O7 by incorporation of Li+ ions

2014 ◽  
Vol 16 (41) ◽  
pp. 22665-22676 ◽  
Author(s):  
B. P. Singh ◽  
A. K. Parchur ◽  
R. S. Ningthoujam ◽  
P. V. Ramakrishna ◽  
S. Singh ◽  
...  
Keyword(s):  
Fluorescence Intensity ◽  
Intensity Ratio ◽  
Graphical Representation ◽  
Temperature Sensing ◽  
Fluorescence Intensity Ratio ◽  
Sensing Applications ◽  
Co Doped

Graphical representation of Li+ co-doped Y2Ti2O7:Er3+/Yb3+ phosphor showing up-conversion of green and red bands and probing the fluorescence intensity ratio (FIR) for temperature sensing applications.

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