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22 April 2006 The impact of hydrogenation conditions on the temperature and strain discrimination of type I and type IA Bragg grating sensors
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Abstract
We report experimental findings for tailoring the temperature and strain coefficients of Type I and Type IA fibre Bragg gratings by influencing the photosensitivity presensitisation of the host optical fibre. It is shown that by controlling the level of hydrogen saturation, via hot and cold hydrogenation, it is possible to produce gratings with lower thermal coefficients. Furthermore, there is a larger difference between the Type I and Type IA thermal coefficients and a significant improvement in the matrix condition number, which impacts the ability to recover accurate temperature and strain data using the Type1-1A dual grating sensor.
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Kyriacos Kalli, A. George Simpson, Kaimin Zhou, Lin Zhang, and Ian Bennion "The impact of hydrogenation conditions on the temperature and strain discrimination of type I and type IA Bragg grating sensors", Proc. SPIE 6189, Optical Sensing II, 61891T (22 April 2006); https://doi.org/10.1117/12.662311
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