Gamma Radiation Tests of Radiation-Hardened Fiber Bragg Grating-Based Sensors for Radiation Environments

• Published in: IEEE transactions on nuclear science 2017-08, Vol.64 (8), p.2307-2311
• Main Authors: Kuhnhenn, J., Weinand, U., Morana, A., Girard, S., Marin, E., Perisse, J., Genot, J. S., Grelin, J., Hutter, L., Melin, G., Lablonde, L., Robin, T., Cadier, B., Mace, J.-R, Boukenter, A., Ouerdane, Y.
• Format: Article
• Language: English
• Subjects: Accelerators; Bragg gratings; Elevated temperature test; Engineering Sciences; Fiber gratings; Gamma rays; gamma-ray effects; Gratings (spectra); High temperature; Nuclear engineering; Nuclear facilities; Operating temperature; optical fiber sensors; optical fiber testing; Optical fibers; Optics; Photonic; Radiation dosage; Radiation effects; Radiation hardening; Radiation tests; Sea measurements; Sensors; Silicon dioxide; Temperature; Temperature effects; Temperature measurement; Temperature sensors; γ Radiation
• ISSN: 0018-9499; 1558-1578
• DOI: 10.1109/TNS.2017.2673023

In the framework of the HOBAN collaborative project funded by KIC InnoEnergy, radiation-hardened fiber Bragg gratings (FBGs) are developed to withstand high levels of radiation dose at high temperatures for their implementation in temperature and strain sensors for nuclear facilities, accelerators or space. This paper presents Gamma radiation test results obtained at room and elevated temperature in hardened FBGs as well as in the optical fibers used for their production. It is shown that radiation-induced Bragg wavelength shift is below ±2 pm corresponding to ±0.2 °C and does not influence the sensor performance even after a total dose of 200 kGy(SiO2) and operating temperature up to 350 °C.