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Université Gustave Eiffel
Commissariat à l'énergie atomique et aux énergies
Électricité de France
Agence nationale pour la gestion des déchets radioactifs

The Final Workshop of the ANR project FO-US will be held on Wednesday, December 3rd, 2025, at Gustave Eiffel University (Nantes campus).
The event will bring together researchers and professionals to share the project’s key findings and perspectives.
[Click here to view the program]
Register now to attend.

ANR-21-CE04-0007 FO-US in brief

The advantages of an embedded optical fiber for monitoring are numerous: a very limited footprint compared to other sensors, a durability that makes it a good candidate for harsh conditions such as salty or radioactive environment, and in addition, as a broadband transducer, it allows multiple-scale analysis. Challenges have yet to be tackled, either on the sensors and their optoelectronics or on data processing.

The ANR FO-US project aims to:   

  • design and validate Fiber Bragg Grating (FBG) for ultrasonic multichannel (a few dozen) measurements at high frequencies (a few hundred of kilo Hertz).   
  • develop and optimize monitoring algorithms that take into account the specificities of optical fiber for active body waves and passive guided wave imaging in relation to two clearly identified industrial needs.   
  • demonstrate, through generic lab experiments dedicated to monitoring algorithms validation (prior to an on-site test), that this new technology can be applied to many other domains.   

The project ANR-21-CE04-0007 FO-US started the 1st of January 2022 for 4 years. It is founded by the French National Research Agency for a total budget of 452,7k€. 

Most recent publication

Nicolas Derrien, Maximilien Lehujeur, Xavier Chapeleau, Olivier Durand, Antoine Gallet, et al.. Challenges of Embedding Fiber Bragg Grating Sensors in Castable Material : Influence of Material Shrinkage and Fiber Coatings on Ultrasonic Measurements. Sensors, 2025, 25 (9), pp.2657. ⟨10.3390/s25092657⟩. ⟨hal-05045724⟩