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Fiber optic sensor for dual measurement of temperature and strain using a combined fluorescence lifetime decay and fiber Bragg grating technique

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4 Author(s)
Wade, S.A. ; Department of Electrical, Electronic and Information Engineering, City University, Northampton Square, London EC1V OHB, United Kingdom ; Forsyth, D.I. ; Grattan, K.T.V. ; Guofu, Q.

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A fiber optic sensor device has been developed incorporating a short length of erbium doped fiber fused in close proximity to a single-fiber Bragg grating, to measure both the fluorescent lifetime decay and the wavelength shift in these respective elements, for temperature and strain determination. Calibration results obtained from this simple, low cost, intrinsic sensor scheme show standard deviation errors of 20.4 μϵ and 1.2 °C over strain and temperature ranges of 22–1860 μϵ and 25–120 °C, respectively. © 2001 American Institute of Physics.

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Review of Scientific Instruments  (Volume:72 ,  Issue: 8 )