Development of fast FBG interrogator with wavelength-swept laser

Tatsuya Yamaguchi; Yukitaka Shinoda

doi:10.1117/12.2177881

5 May 2015 Development of fast FBG interrogator with wavelength-swept laser

Tatsuya Yamaguchi, Yukitaka Shinoda

Proceedings Volume 9506, Optical Sensors 2015; 95061F (2015) https://doi.org/10.1117/12.2177881
Event: SPIE Optics + Optoelectronics, 2015, Prague, Czech Republic

Abstract

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.

Citation Download Citation

Tatsuya Yamaguchi and Yukitaka Shinoda "Development of fast FBG interrogator with wavelength-swept laser", Proc. SPIE 9506, Optical Sensors 2015, 95061F (5 May 2015); https://doi.org/10.1117/12.2177881

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