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A double-arched-beam-based fiber Bragg grating (FBG) displacement sensor is presented. Unlike most interrogation methods by measuring the resonance wavelength shifts, this kind of FBG sensor is proposed to measure the displacement by measuring the FBG's reflective spectra bandwidth using a blazed fiber Bragg grating (blazed FBG) and a fiber optic array. According to the strain distribution on the...
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