The difficulties encountered in the implementation of a temperature or strain sensor based on fiber Bragg grating (FBG) in a harsh radiative environment are introduced. We present the choices made to select both a radiation-resistant fiber in terms of transmission and also the grating inscription conditions necessary to write radiation tolerant FBGs in such fibers with a femtosecond laser. The radiation response of these gratings was also studied under radiation at dose up to 1 MGy. The comparison between Ge-free and Ge-doped fibers was highlighted.
Morana, A., Girard, S., Marin, E., Marcandella, C., Rizzolo, S., Périsse, J., et al. (2015). Radiation Vulnerability of Fiber Bragg Gratings in Harsh Environments. JOURNAL OF LIGHTWAVE TECHNOLOGY, 33(12), 2646-2651 [10.1109/JLT.2014.2364526].
Radiation Vulnerability of Fiber Bragg Gratings in Harsh Environments
MORANA, Adriana;RIZZOLO, Serena;CANNAS, Marco;
2015-01-01
Abstract
The difficulties encountered in the implementation of a temperature or strain sensor based on fiber Bragg grating (FBG) in a harsh radiative environment are introduced. We present the choices made to select both a radiation-resistant fiber in terms of transmission and also the grating inscription conditions necessary to write radiation tolerant FBGs in such fibers with a femtosecond laser. The radiation response of these gratings was also studied under radiation at dose up to 1 MGy. The comparison between Ge-free and Ge-doped fibers was highlighted.
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