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Proceedings Article

Radiation hardness of fiber optic sensors for monitoring and remote handling applications in nuclear environments

[+] Author Affiliations
Francis Berghmans, Alberto F. Fernandez, Benoit Brichard, Frans Vos, Marc C. Decreton

SCK*CEN-Belgian Nuclear Research Ctr. (Belgium)

Andrei I. Gusarov

SCK*CEN-Belgian Nuclear Research Ctr. and Faculte Polytechnique de Mons (Belgium)

Olivier Deparis

Faculte Polytechnique de Mons (United Kingdom)

Patrice Megret, Michel Blondel

Faculte Polytechnique de Mons (Belgium)

Serge Caron, Andre Morin

National Optics Institute (Canada)

Proc. SPIE 3538, Process Monitoring with Optical Fibers and Harsh Environment Sensors, 28 (January 11, 1999); doi:10.1117/12.335757
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From Conference Volume 3538

  • Process Monitoring with Optical Fibers and Harsh Environment Sensors
  • Michael A. Marcus; Anbo Wang
  • Boston, MA | November 01, 1998

abstract

We report on our irradiation experiments on different types of fiber-optic sensors, including three types of commercially available temperature sensors, a multimode extrinsic Fabry-Perot cavity strain sensor and fiber Bragg- gratings. For the temperature sensors, results show that gamma radiation does not interfere with the basic sensing mechanism and that the most critical component turns out to be the optical fiber itself. Semiconductor absorption temperature sensor showed no degradation up to total doses of 250 kGy, whereas the specifications of Fabry-Perot type sensor and fluorescence temperature sensors were already dramatically influenced below the kGy-level. Replacing the optical fiber by a more radiation resistant version allowed to increase the radiation hardness of the fluorescence sensors system by orders of magnitude. The use of fiber- optic sensors in the presence of neutron radiation remains compromised. Similar conclusions are valid for the Fabry- Perot type fiber-optic strain sensors. We finally show that the Bragg-grating resonance wavelength can shift with radiation dose, but that the temperature sensitivity remains unaltered.

© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Francis Berghmans ; Alberto F. Fernandez ; Benoit Brichard ; Frans Vos ; Marc C. Decreton, et al.
"Radiation hardness of fiber optic sensors for monitoring and remote handling applications in nuclear environments", Proc. SPIE 3538, Process Monitoring with Optical Fibers and Harsh Environment Sensors, 28 (January 11, 1999); doi:10.1117/12.335757; http://dx.doi.org/10.1117/12.335757


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