High-Speed Full-Spectrum Interrogation of Fiber Bragg Gratings for Composite Impact Sensing

Authors

Spencer Chadderdon, Brigham Young University
Dr. Richard Selfridge, Brigham Young University

Keywords

Fiber Bragg Grating, FBG, composite impact sensing, peak-tracking methods

College

Ira A. Fulton College of Engineering and Technology

Department

Electrical and Computer Engineering

Abstract

Fiber Bragg gratings (FBG) sensors are useful for static and dynamic event monitoring which make then suitable for a wide variety of applications. Dynamic interrogation of FBG sensors has primarily been performed using peak-tracking methods that have repetition rates approaching the megahertz range. However, tracking the variations in the peak response of a FBG sensor reflection spectrum can result in inaccurate measurements. For example, when under the influence of vibrations, acoustical noise, and transverse strains FBG sensor spectra associated with impact and vibrations not only have peak shifts, but the reflection spectrum can exhibit dramatic spreading or even peak splitting.

Recommended Citation

Chadderdon, Spencer and Selfridge, Dr. Richard (2013) "High-Speed Full-Spectrum Interrogation of Fiber Bragg Gratings for Composite Impact Sensing," Journal of Undergraduate Research: Vol. 2013: Iss. 1, Article 1921.
Available at: https://scholarsarchive.byu.edu/jur/vol2013/iss1/1921