7 April 2010 High-speed full-spectrum interrogation of fiber Bragg gratings for composite impact sensing
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Abstract
This paper presents a means for the high repetition rate interrogation of fiber Bragg gratings (FBG's). The new system highlights a method that allows a tradeoff between the full spectrum capture rate and the wavelength range and/or the spectral resolution of the technique. Rapid capture of the entire reflection spectrum at high interrogation rates shows important features that are missed when using methods that merely track changes in the peak location of the spectrum. The essential feature of the new system is that it incorporates a MEMs tunable filter driven by a variable frequency openloop sinusoidal source. The paper demonstrates the new system on a laminated composite system under impact loading.
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S. Chadderdon, T. Vella, R. Selfridge, S. Schultz, S. Webb, C. Park, K. Peters, M. Zikry, "High-speed full-spectrum interrogation of fiber Bragg gratings for composite impact sensing", Proc. SPIE 7648, Smart Sensor Phenomena, Technology, Networks, and Systems 2010, 764803 (7 April 2010); doi: 10.1117/12.847662; https://doi.org/10.1117/12.847662
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