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Vol. 34, No. 8(3), S&M3042

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Vol. 32, No. 8(2), S&M2292

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Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
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Sensors and Materials, Volume 26, Number 10 (2014)
Copyright(C) MYU K.K.
pp. 745-751
S&M1038 Research Paper
https://doi.org/10.18494/SAM.2014.1037
Published: December 22, 2014

Fiber-Optic Temperature Sensor Based on Temperature-Dependent Refractive Index of Germanium-Silica Coating Stack [PDF]

Chunxian Tao, Dawei Zhang, Ruijin Hong, Yuanshen Huang and Daohua Zhang

(Received April 10, 2014; Accepted September 18, 2014)

Keywords: temperature sensor, optical fiber, refractive index, germanium coating

We report on a novel fiber-optic temperature sensor based on the temperature-dependent refractive index of a germanium-silica (Ge-SiO2) coating stack. The relationship between the reflectivity and the temperature-dependent refractive index of the Ge-SiO2 coating stack at 1550 nm is theoretically investigated. A reflection-type fiber-optic probe with high sensitivity and wide response range is designed and fabricated by physical vapor deposition. Experimental results show that the reflectivity is linearly dependent on temperature in the range of −30 to 130 ℃, and the sensor exhibits high sensitivity and structural stability in the range of 50 to 500 K.

Corresponding author: Dawei Zhang


Cite this article
Chunxian Tao, Dawei Zhang, Ruijin Hong, Yuanshen Huang and Daohua Zhang, Fiber-Optic Temperature Sensor Based on Temperature-Dependent Refractive Index of Germanium-Silica Coating Stack, Sens. Mater., Vol. 26, No. 10, 2014, p. 745-751.



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