Integration of a Micro Fabry-Perot Cavity and a Fiber Bragg Grating Sensor for Simultaneous Measurement Of Stress And Temperature

ABSTRACT We report the realization of a fiber sensor for simultaneous measurement of stress and temperature based on the integration of a fiber Bragg grating (FBG) and a micro external Fabry‐Perot (F‐P) cavity constructed with a thin film coated on a fiber end. The Bragg wavelength shift is used to...

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Bibliographic Details
Published in:Microwave and optical technology letters 2013-10, Vol.55 (10), p.2440-2444
Main Authors: Li, Jiao-Yang, Huang, Xu-Guang, Cheng, Guang-Ming, Chen, Luan-Xiong, Jin, Xue-Mei
Format: Article
Language:English
Subjects:
Bragg gratings
Fabry-Perot
fiber optic sensor
Fibers
Holes
micro Fabry-Perot cavity
Microwaves
Sensors
stress-temperature discrimination
Stresses
thin film
Wavelengths
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Summary:ABSTRACT We report the realization of a fiber sensor for simultaneous measurement of stress and temperature based on the integration of a fiber Bragg grating (FBG) and a micro external Fabry‐Perot (F‐P) cavity constructed with a thin film coated on a fiber end. The Bragg wavelength shift is used to measure stress while the wavelength shift of the F‐P interference fringes is traced for determining the temperature, which can also compensate the thermal stress of FBG induced by temperature change. A temperature sensitivity of ∼0.2 nm/°C and a stress sensitivity of 8.11 × 10−3 nm/N with good stability can be achieved. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2440–2444, 2013
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.27857