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Characteristics of a Fiber Bragg Grating Temperature Sensor Using the Thermal Strain of an External Tube
- Characteristics of a Fiber Bragg Grating Temperature Sensor Using the Thermal Strain of an External Tube
- Lee, Cherl-Hee; Lee, Jonghun; Kim, Min-Kuk; Kim, Kwang Taek
- DGIST Authors
- Lee, Cherl-Hee; Lee, Jonghun
- Issue Date
- Journal of the Korean Physical Society, 59(5), 3188-3191
- Article Type
- Enhanced Sensitivity; External Tube; Fiber Bragg Grating; SENSITIVITY; Temperature Sensor; Thermal Strain
- The characteristics of a fiber Bragg grating (FBG) temperature sensor using thermal expansion of an external tube is presented. For enhancement of the temperature sensitivity of a bare FBG fiber, both sides of the FBG fiber were glued with epoxy to a cylindrical ceramic tube as an external tube and. pulled due to the thermal expansion of the cylindrical ceramic tube, which was made of hard, fracture-tough Zirconia (ZrO(2)) with higher thermal expansion coefficient. The presented FBG sensor was heated on the surface of the hot plate at temperature from -5 degrees C to 100 degrees C and had a response time of 6 seconds/degrees C. The temperature sensitivity of the fabricated FBG temperature sensor was improved 2.84 times when compared to that of a bare FBG fiber. The coupling characteristic of the fabricated FBG temperature sensor was analyzed by using coupled-mode theory.
- Korean Physical Society
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