Ospald, F., Zouaghi, W., Beigang, R., Matheis, C., Jonuscheit, J., Recur, B., … & González, L. V. (2014). Aeronautics composite material inspection with a terahertz time-domain spectroscopy system. Optical Engineering, 53(3), 031208-031208.
Terahertz is a powerful technique allowing non destructive test of composite materials. Both time and frequency domain, pulsed and FMCW can be used to inspect composite materials from the aeronautics industry. Several defects like crack, insertions or debonds can be revealed.