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

Authors

Tyrie Vella, Brigham Young University
Dr. Richard Selfridge, Brigham Young University

Keywords

Fiber Bragg Grating, FBG, laminate sensing, MEMS

College

Ira A. Fulton College of Engineering and Technology

Department

Electrical and Computer Engineering

Abstract

Fiber Bragg Grating (FBG) sensors are specialized optical fibers that can be used for detecting changes in strain. Under normal conditions, when a broadband spectrum of light is transmitted through the fiber, a narrow band of light is reflected by the sensor. When an FBG is embedded into a composite material and the material is placed under stress, the wavelength at which the reflected band is centered shifts in proportion to the stress, allowing the strain to be measured. By monitoring the sensor during repeated impacts on the material, structural damage can be discerned and the material could be replaced or repaired before catastrophic failure.

Recommended Citation

Vella, Tyrie and Selfridge, Dr. Richard (2013) "High-Speed Full-Spectrum Interrogation of Fiber Bragg Gratings for Composite Laminate Sensing," Journal of Undergraduate Research: Vol. 2013: Iss. 1, Article 1916.
Available at: https://scholarsarchive.byu.edu/jur/vol2013/iss1/1916