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We propose a compact multi-parameter fibre sensing module based on a fibre Bragg grating (FBG) in single–multi–single mode fibre structure (FBG-in-SMS). We experimentally demonstrated that the FBG-in-SMS can measure temperature and strain simultaneously. In addition, we found that the process of writing FBG in SMS could be an effective technique for tuning and optimizing SMS spectrum for sensing.
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Song et al. (2014) studied this question.
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