Sapphire Fiber High-Temperature Tip Sensor With Multilayer Coating

Multilayers of dielectric oxide coated at the end of sapphire fiber act as Fabry-Perot interferometer, and high-temperature sensing elements are proposed and demonstrated. Broadband tungsten halogen lamp is used to generate interferometric fringes from which the temperature-dependent optical thickne...

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Bibliographic Details
Published in:IEEE photonics technology letters 2015-04, Vol.27 (7), p.741-743
Main Authors: Lee, Dongwen, Tian, Zhipeng, Dai, Jixiang, Hu, Wenbin, Yang, Minghong
Format: Article
Language:English
Subjects:
Coatings
Fabry-Perot Interferometer
High temperature sensor
multilayer coating
Nonhomogeneous media
Optical fiber sensors
Optical fibers
Optical interferometry
Sapphire fiber
Temperature measurement
Temperature sensors
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Summary:Multilayers of dielectric oxide coated at the end of sapphire fiber act as Fabry-Perot interferometer, and high-temperature sensing elements are proposed and demonstrated. Broadband tungsten halogen lamp is used to generate interferometric fringes from which the temperature-dependent optical thickness change of the coatings can be accurately determined. Experimental investigation shows that the sensor exhibits a temperature responsibility of 40.7 pm/°C when the ambient temperature changes from 400 °C to 1000 °C. The sensor is proved to be simple in configuration and easy for batch fabrication.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2015.2390916