Noncontact thermometry based on downconversion luminescence from Eu3+ doped LiNbO3 single crystal

Zhang Liang; Feng Qin; Yangdong Zheng; Zhiguo Zhang; Wenwu Cao

doi:10.1016/j.sna.2015.12.018

Noncontact thermometry based on downconversion luminescence from Eu³⁺ doped LiNbO₃ single crystal

Zhang Liang, Feng Qin, Yangdong Zheng, Zhiguo Zhang, Wenwu Cao

Research output: Contribution to journal › Article › peer-review

56 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	215-219
Number of pages	5
Journal	Sensors and Actuators, A: Physical
Volume	238
DOIs	https://doi.org/10.1016/j.sna.2015.12.018
State	Published - Feb 1 2016

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering

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10.1016/j.sna.2015.12.018

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title = "Noncontact thermometry based on downconversion luminescence from Eu3+ doped LiNbO3 single crystal",

abstract = "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.",

author = "Zhang Liang and Feng Qin and Yangdong Zheng and Zhiguo Zhang and Wenwu Cao",

year = "2016",

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day = "1",

doi = "10.1016/j.sna.2015.12.018",

language = "English (US)",

volume = "238",

pages = "215--219",

journal = "Sensors and Actuators, A: Physical",

issn = "0924-4247",

publisher = "Elsevier B.V.",

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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

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.

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M3 - Article

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SN - 0924-4247

VL - 238

SP - 215

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JO - Sensors and Actuators, A: Physical

JF - Sensors and Actuators, A: Physical

ER -

Noncontact thermometry based on downconversion luminescence from Eu³⁺ doped LiNbO₃ single crystal

Abstract

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