5 May 2015 Development of fast FBG interrogator with wavelength-swept laser
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The objective of this research is the construction of a structural health monitoring system that uses fiber Bragg grating (FBG) to determine the health of structures. We develop fast FBG interrogator for real-time measurement of the reflected wavelength of a multipoint FBG to monitor the broadband vibration of a structure. This FBG interrogator, which combines a wavelength-swept laser and a real-time measurement system is capable of measuring wavelength within a standard deviation of 2×10-3 nm or less. We have demonstrated that the FBG interrogator is able to measure vibration that has a resonance frequency of 440 Hz at intervals of 0.1 ms with a multipoint FBG.
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Tatsuya Yamaguchi, Tatsuya Yamaguchi, Yukitaka Shinoda, Yukitaka Shinoda, "Development of fast FBG interrogator with wavelength-swept laser", Proc. SPIE 9506, Optical Sensors 2015, 95061F (5 May 2015); doi: 10.1117/12.2177881; https://doi.org/10.1117/12.2177881

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