Jean-Paul Guillet personal page
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.
This article examines the possibility of using a high frequency radar (300 GHz) to detect fractures and lithological changes in rocks. This study, carried out in collaboration between Federico Sanjuan (University of Pau, France) and the IMS laboratory (University of Bordeaux), is in the context of the improvement of the methods of detection and quantification…
In this paper published in july 2020 in IEEE Transactions on Terahertz Science and Technology, we present a reflectometry sensing system associated with a frequency modulated continuous wave radar. Then, a solid immersion lens is added to the system to improve the resolution. Abstract of terahertz reflectometry setup Frequency Modulated Continuous Wave (FMCW) radar systems…
In this paper, we study of the impact of low-frequency noise on terahertz-computed tomography (THz-CT). Two acquisition methods are compared in order to analyze how the low frequency noise is projected into the 3D image after reconstruction.
In this paper, a processing sequence has been developed to achieve automated analysis and measurements from 3D terahertz acquisitions. This sequence first performs a tomographic reconstruction from a 3D acquisition made by a continuous millimetre wave system. This reconstruction is based on the Ordered Subsets Convex (OSC) algorithm and has been optimized for 3D THz…
This paper presents a CW terahertz near-field reflectometry setup using metal wires waveguide. This setup, developped at Montpellier University, is working at 100 GHz.
This paper presents terahertz non destructive test of 3D printed materials in the framework of MetAMMI project.
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.