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An Active Core Fiber-Optic Temperature Sensor Using an Eu(III)-Doped Sol-Gel Silica Fiber as a Temperature Indicator

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2 Author(s)
Haiquan Guo ; Clean Energy Technol., Mississippi State Univ., Starkville, MS ; Shiquan Tao

An active core fiber-optic temperature sensor has been developed by using an Eu(III)-doped sol-gel silica fiber as a temperature indicator and has been tested for sensing temperature in the range from 80 degC to 500 degC. The fluorescence of Eu(III) doped inside the sol-gel silica fiber was excited with a simple LED with peak wavelength at 420 nm and the fluorescence intensity was recorded as a sensing signal. The fluorescence intensity decreases with the increase of temperature. In the temperature range from 140 degC to 300 degC, the attenuation of the fluorescence intensity of the fiber-optic sensor in decibel has a linear relationship with temperature

Published in:

IEEE Sensors Journal  (Volume:7 ,  Issue: 6 )