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Temperature-immune and intensity-referenced pressure sensor based on strain-induced quadratic-chirped fibre bragg grating

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7 Author(s)
Guo, T. ; Inst. of Modern Opt., Nankai Univ., Tianjin ; Yang, J. ; Zhao, Q.D. ; Huang, G.L.
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A technique for temperature-immune pressure measurement using a strain-induced quadratic-chirped fibre Bragg grating by differential optical power detection is demonstrated. Linear pressure measurement up to 20 kPa with a resolution of 0.05 kPa and thermal stability less than 2% full-scale for a temperature range from 0 to 80degC are achieved using pin photodiodes detection, without any temperature compensation

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Electronics Letters  (Volume:43 ,  Issue: 2 )