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Integration of a Micro Fabry‐Perot Cavity and a Fiber Bragg Grating Sensor for Simultaneous Measurement Of Stress And Temperature
Author(s) -
Li JiaoYang,
Huang XuGuang,
Cheng GuangMing,
Chen LuanXiong,
Jin XueMei
Publication year - 2013
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.27857
Subject(s) - fiber bragg grating , materials science , fabry–pérot interferometer , optics , stress (linguistics) , temperature measurement , fiber optic sensor , sensitivity (control systems) , optoelectronics , wavelength , optical fiber , phosfos , fiber , polarization maintaining optical fiber , composite material , electronic engineering , physics , linguistics , philosophy , quantum mechanics , engineering
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