Shocks Sensing by Fiber Bragg Gratings and a 100 MHz Dynamic Dispersive Interrogator - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Access content directly
Conference Papers Year :

Shocks Sensing by Fiber Bragg Gratings and a 100 MHz Dynamic Dispersive Interrogator

Yohan Barbarin
Connectez-vous pour contacter l'auteur
A. Lefrancois
  • Function : Author
B. Rougier
  • Function : Author
F. Sinatti
  • Function : Author
O. Lassalle
  • Function : Author
A. Osmont
  • Function : Author
J. Luc
  • Function : Author

Abstract

A multi-channels high resolution dispersive interrogator with at a high sampling rate has been developed to measure shocks pressure levels by Fiber Bragg Gratings (FBGs). Two FBG orientations are compared numerically and experimentally. The first one is along the cylindrical target axis, thus the grating spectrum is "blue shifted". The second orientation is perpendicular to the target axis and the grating spectrum is "red shifted". The interrogator uses a femtosecond laser source to cover the C+L band spectrum. The source repetition rate (100 MHz) fixes the spectra acquisition rate. The wavelengths are basically converted to time using a long telecom fiber. The time-multiplexed spectra are recorded with 400 points by a fast oscilloscope (40 GSa/s). The experimental setup is a Tin plate impact on a PMMA target performed in a 35-mm single-stage gas gun. An impact at 510 m/s generates a pressure level of 1.69 GPa during 5 µs. The performance of the dynamic interrogator and the wavelength shifts in the two FBG configurations are discussed.
Fichier principal
Vignette du fichier
IEEE_RAPID_BraggPulse_YB_06.pdf (449.38 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

cea-02549054 , version 1 (21-04-2020)

Identifiers

Cite

Yohan Barbarin, A. Lefrancois, B. Rougier, F. Sinatti, O. Lassalle, et al.. Shocks Sensing by Fiber Bragg Gratings and a 100 MHz Dynamic Dispersive Interrogator. 2018 IEEE Research and Applications of Photonics In Defense Conference (RAPID), Aug 2018, Miramar Beach, United States. pp.1-3, ⟨10.1109/RAPID.2018.8508992⟩. ⟨cea-02549054⟩

Collections

CEA DAM
39 View
147 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More